. (Physics & Chem.) a particle emitted at high velocity from certain radioactive substances. It is identical to the helium nucleus, consisting of two protons and two neutrons. Rays of such particles are called alpha rays. [ Webster 1913 Suppl. +PJC ]

n. (Physics) A fundamental particle which has the same mass as one of the common fundamental particles, but which has an opposite charge, and for which certain other of the properties (e. g. baryon number, strangeness) may be opposite to that of the normal particle. The antiparticle to an electron is called a positron; the antiparticle to a proton is called an antiproton; the antiparticle to a neutron is called an antineutron. When a particle and its corresponding antiparticle collide, they typically annihilate each other with the production of large quantities of energy, usually in the form of radiation. The interaction of a proton and antiproton cause annihilation with production of mesons. [ PJC ]

adv. [ F. à part; (L. ad) + part part. See Part. ] 1. Separately, in regard to space or company; in a state of separation as to place; aside. [ 1913 Webster ]

Others apart sat on a hill retired. Milton. [ 1913 Webster ]

The Lord hath set apart him that is godly for himself. Ps. iv. 3. [ 1913 Webster ]

2. In a state of separation, of exclusion, or of distinction, as to purpose, use, or character, or as a matter of thought; separately; independently; as, consider the two propositions apart. [ 1913 Webster ]

3. Aside; away. “Wherefore lay apart all filthiness and superfluity of naughtiness.” Jas. i. 21. [ 1913 Webster ]

Let Pleasure go, put Care apart. Keble. [ 1913 Webster ]

4. In two or more parts; asunder; to piece; as, to take a piece of machinery apart. [ 1913 Webster ]

n. [ Afrikaans, fr. D. apart apart + -heid -hood. ] 1. segregation by race; -- a term used in South Africa.
Syn. -- racial segregation [ WordNet 1.5 ]

2. the official policy of strict segregation by race practised by the government of the Union of South Africa up to 1993. [ WordNet 1.5 ]

n. [ F. appartement; cf. It. appartamento, fr. appartare to separate, set apart; all fr. L. ad + pars, partis, part. See Apart. ] 1. A room in a building; a division in a house, separated from others by partitions. Fielding. [ 1913 Webster ]

2. A set or suite of rooms. De Quincey. [ 1913 Webster ]

3. A compartment. [ Obs. ] Pope. [ 1913 Webster ]

4. A room or suite of rooms in a building comprising a dwelling unit separate from others in the building, and typically having its own separate bath, sanitary, and kitchen facilities. Such apartments are in most cases rented from the owner by those dwelling in them. [ PJC ]

efficiency apartment, a small apartment{ 4 }, sometimes furnished, with minimal kitchen and bath facilities. The unit may comprise a single room plus a bathroom, and the kitchen facilities are often open to the main room, or may form a small niche in a corner. There are many variations of efficiency apartment, including some in which furnishings such as a bed may be pull out from a wall recess and stored there again when not in use. Also called an efficiency. [ PJC ]

. A building comprising a number of lving units (apartments{ 4 }) designed for separate housekeeping tenements, but having conveniences, such as heat, light, elevator service, etc., furnished in common; contrasted to a detached dwelling. Sometimes distinguished in the United States from a flat house, in which each living unit comprises one entire floor, whereas in an apartment house a floor may be partitioned into any number of apartments{ 4 }. [ Webster 1913 Suppl. +PJC ]

n. The quality of standing apart. [ 1913 Webster ]

n. 1. an artificial sweetener containing an aspartic acid peptide, (C14H18N2O5); it is 160 times sweeter than sucrose (cane sugar) and is used as a calorie-free sweetener. Chemically it is N-L-α-aspartyl-L-phenylalanine-1-methyl ester. It is sold also under the trade name Equal. [ WordNet 1.5 ]

a. (Chem.) Pertaining to, or derived, asparagine; as, aspartic acid. [ 1913 Webster ]

a. [ Cf. F. bipartible. See Bipartite. ] Capable of being divided into two parts. [ 1913 Webster ]

a. [ L. bis twice + partiens, p. pr. of partire to divide. ] Dividing into two parts. -- n. A number that divides another into two equal parts without a remainder. [ 1913 Webster ]

a. Divisible into two parts. [ 1913 Webster ]

a. [ L. bipartitus, p. p. of bipartire; bis twice + partire. See Partite. ] 1. Being in two parts; having two correspondent parts, as a legal contract or writing, one for each party; shared by two; as, a bipartite treaty. [ 1913 Webster ]

2. Divided into two parts almost to the base, as a leaf; consisting of two parts or subdivisions. Gray. [ 1913 Webster ]

n. The act of dividing into two parts, or of making two correspondent parts, or the state of being so divided. [ 1913 Webster ]

a. Of or pertaining to Napoleon Bonaparte or his family. [ 1913 Webster ]

n. The policy of Bonaparte or of the Bonapartes. [ 1913 Webster ]

n. One attached to the policy or family of Bonaparte, or of the Bonapartes. [ 1913 Webster ]

n. a genus containing two species of small New Zealand trees: weeping tree broom; endangered.
Syn. -- genus Chordospartium. [ WordNet 1.5 ]

v. t. [ imp. & p. p. Comparted; p. pr. & vb. n. Comparting. ] [ L. compartiri; com- + partiri, partire to share, pars, partis, part, share: cf. OF. compartir. See Part, v. t. ] To divide; to mark out into parts or subdivisions. [ R. ] [ 1913 Webster ]

The crystal surface is comparted all
In niches verged with rubies. Glover. [ 1913 Webster ]

n. [ LL. compartitio. ] The act of dividing into parts or compartments; division; also, a division or compartment. [ Obs. ] [ 1913 Webster ]

Their temples . . . needed no compartitions. Sir H. Wotton. [ 1913 Webster ]

n. [ F. compartiment, OF. compartir to divide. See Compart. ] 1. One of the parts into which an inclosed portion of space is divided, as by partitions, or lines; as, the compartments of a cabinet, a house, or a garden. [ 1913 Webster ]

In the midst was placed a large compartment composed of grotesque work. Carew. [ 1913 Webster ]

2. (Shipbuilding) One of the sections into which the hold of a ship is divided by water-tight bulkheads. [ 1913 Webster ]

adj. 1. divided up into compartments or categories. [ WordNet 1.5 ]

adj. 1. divided up into compartments; as, a compartmented box. [ WordNet 1.5 ]

n. See Copartner. [ Obs. ] [ 1913 Webster ]

v. t. [ Cf. Compart ] To share. [ Obs. ] [ 1913 Webster ]

For, of all miserias, I hold that chief
Wretched to be, when none coparts our grief. Webster (1661). [ 1913 Webster ]

n. A compartment. [ Obs. ] T. Warton. [ 1913 Webster ]

n. One who is jointly concerned with one or more persons in business, etc.; a partner; an associate; a partaker; a sharer. [ 1913 Webster ]

the associates and copartners of our loss. Milton. [ 1913 Webster ]

n. 1. The state of being a copartner or of having a joint interest in any matter. [ 1913 Webster ]

2. A partnership or firm; as, A. and B. have this day formed a copartnership. [ 1913 Webster ]

n.; pl. Copartneries the state of being copartners in any undertaking. [ R. ] [ 1913 Webster ]

n. 1. A part corresponding to another part; anything which answers, or corresponds, to another; a copy; a duplicate; a facsimile. [ 1913 Webster ]

In same things the laws of Normandy agreed with the laws of England, so that they seem to be, as it were, copies or counterparts one of another. Sir M. Hale. [ 1913 Webster ]

2. (Law) One of two corresponding copies of an instrument; a duplicate. [ 1913 Webster ]

3. A person who closely resembles another. [ 1913 Webster ]

4. A thing may be applied to another thing so as to fit perfectly, as a seal to its impression; hence, a thing which is adapted to another thing, or which supplements it; that which serves to complete or complement anything; hence, a person or thing having qualities lacking in another; an opposite. [ 1913 Webster ]

O counterpart
Of our soft sex, well are you made our lords. Dryden. [ 1913 Webster ]

v. i. [ imp. & p. p. Departed; p. pr. & vb. n. Departing. ] [ OE. departen to divide, part, depart, F. départir to divide, distribute, se départir to separate one's self, depart; pref. dé- (L. de) + partir to part, depart, fr. L. partire, partiri, to divide, fr. pars part. See Part. ] 1. To part; to divide; to separate. [ Obs. ] Shak. [ 1913 Webster ]

2. To go forth or away; to quit, leave, or separate, as from a place or a person; to withdraw; -- opposed to arrive; -- often with from before the place, person, or thing left, and for or to before the destination. [ 1913 Webster ]

I will depart to mine own land. Num. x. 30. [ 1913 Webster ]

Ere thou from hence depart. Milton. [ 1913 Webster ]

He which hath no stomach to this fight,
Let him depart. Shak. [ 1913 Webster ]

3. To forsake; to abandon; to desist or deviate (from); not to adhere to; -- with from; as, we can not depart from our rules; to depart from a title or defense in legal pleading. [ 1913 Webster ]

If the plan of the convention be found to depart from republican principles. Madison. [ 1913 Webster ]

4. To pass away; to perish. [ 1913 Webster ]

The glory is departed from Israel. 1 Sam. iv. 21. [ 1913 Webster ]

5. To quit this world; to die. [ 1913 Webster ]

Lord, now lettest thou thy servant depart in peace. Luke ii. 29. [ 1913 Webster ]

To depart with, to resign; to part with. [ Obs. ] Shak. [ 1913 Webster ]

v. t. 1. To part thoroughly; to dispart; to divide; to separate. [ Obs. ] [ 1913 Webster ]

Till death departed them, this life they lead. Chaucer. [ 1913 Webster ]

2. To divide in order to share; to apportion. [ Obs. ] [ 1913 Webster ]

And here is gold, and that full great plentee,
That shall departed been among us three. Chaucer. [ 1913 Webster ]

3. To leave; to depart from. “He departed this life.” Addison. “Ere I depart his house.” Shak. [ 1913 Webster ]

n. [ Cf. F. départ, fr. départir. ] 1. Division; separation, as of compound substances into their ingredients. [ Obs. ] [ 1913 Webster ]

The chymists have a liquor called water of depart. Bacon. [ 1913 Webster ]

2. A going away; departure; hence, death. [ Obs. ] [ 1913 Webster ]

At my depart for France. Shak. [ 1913 Webster ]

Your loss and his depart. Shak. [ 1913 Webster ]

a. Divisible. [ Obs. ] Bacon. [ 1913 Webster ]

n. sing. & pl. someone who is no longer alive; as, let us pray for the departed.
Syn. -- dead person, dead soul, deceased person, deceased, decedent. [ WordNet 1.5 ]

adj. 1. past; -- used of time; as, departed summers.
Syn. -- bygone, bypast, foregone, gone. [ WordNet 1.5 +PJC ]

2. dead; as, our dear departed parents. [ euphemistic ]
Syn. -- asleep(predicate), at peace(predicate), at rest(predicate), cold, deceased, gone. [ WordNet 1.5 ]

n. 1. One who refines metals by separation. [ Obs. ] [ 1913 Webster ]

2. One who departs. [ 1913 Webster ]

adj. leaving a starting or stopping point on a journey; as, Departing flights were delayed by the snowstorm. Opposite of arriving. [ prenominal ]
Syn. -- outbound, outward, outward-bound. [ WordNet 1.5 +PJC ]

n. [ F. département, fr. départir. See Depart, v. i. ] 1. Act of departing; departure. [ Obs. ] [ 1913 Webster ]

Sudden departments from one extreme to another. Wotton. [ 1913 Webster ]

2. A part, portion, or subdivision. [ 1913 Webster ]

3. A distinct course of life, action, study, or the like; appointed sphere or walk; province. [ 1913 Webster ]

Superior to Pope in Pope's own peculiar department of literature. Macaulay. [ 1913 Webster ]

4. Subdivision of business or official duty; especially, one of the principal divisions of executive government; as, the treasury department; the war department; also, in a university, one of the divisions of instruction; as, the medical department; the department of physics. [ 1913 Webster ]

5. A territorial division; a district; esp., in France, one of the districts composed of several arrondissements into which the country is divided for governmental purposes; as, the Department of the Loire. [ 1913 Webster ]

6. A military subdivision of a country; as, the Department of the Potomac. [ 1913 Webster ]

a. Pertaining to a department or division. Burke. [ 1913 Webster ]

. A store keeping a great variety of goods which are arranged in several departments. [ Webster 1913 Suppl. +PJC ]

n. [ From Depart. ] 1. Division; separation; putting away. [ Obs. ] [ 1913 Webster ]

No other remedy . . . but absolute departure. Milton. [ 1913 Webster ]

2. Separation or removal from a place; the act or process of departing or going away. [ 1913 Webster ]

Departure from this happy place. Milton. [ 1913 Webster ]

3. Removal from the present life; death; decease. [ 1913 Webster ]

The time of my departure is at hand. 2 Tim. iv. 6. [ 1913 Webster ]

His timely departure . . . barred him from the knowledge of his son's miseries. Sir P. Sidney. [ 1913 Webster ]

4. Deviation or abandonment, as from or of a rule or course of action, a plan, or a purpose. [ 1913 Webster ]

Any departure from a national standard. Prescott. [ 1913 Webster ]

5. (Law) The desertion by a party to any pleading of the ground taken by him in his last antecedent pleading, and the adoption of another. Bouvier. [ 1913 Webster ]

6. (Nav. & Surv.) The distance due east or west which a person or ship passes over in going along an oblique line. [ 1913 Webster ]

☞ Since the meridians sensibly converge, the departure in navigation is not measured from the beginning nor from the end of the ship's course, but is regarded as the total easting or westing made by the ship or person as he travels over the course. [ 1913 Webster ]

To take a departure (Nav. & Surv.), to ascertain, usually by taking bearings from a landmark, the position of a vessel at the beginning of a voyage as a point from which to begin her dead reckoning; as, the ship took her departure from Sandy Hook.

Syn. -- Death; demise; release. See Death. [ 1913 Webster ]

a. [ L. digitus finger + partite. ] (Bot.) Parted like the fingers. [ 1913 Webster ]

v. t. [ imp. & p. p. Disparted; p. pr. & vb. n. Disparting. ] [ Pref. dis- + part: cf. OF. despartir. ] To part asunder; to divide; to separate; to sever; to rend; to rive or split; as, disparted air; disparted towers. [ Archaic ] [ 1913 Webster ]

Them in twelve troops their captain did dispart. Spenser. [ 1913 Webster ]

The world will be whole, and refuses to be disparted. Emerson. [ 1913 Webster ]

v. i. To separate, to open; to cleave. [ 1913 Webster ]

n. 1. (Gun.) The difference between the thickness of the metal at the mouth and at the breech of a piece of ordnance. [ 1913 Webster ]

On account of the dispart, the line of aim or line of metal, which is in a plane passing through the axis of the gun, always makes a small angle with the axis. Eng. Cys. [ 1913 Webster ]

2. (Gun.) A piece of metal placed on the muzzle, or near the trunnions, on the top of a piece of ordnance, to make the line of sight parallel to the axis of the bore; -- called also dispart sight, and muzzle sight. [ 1913 Webster ]

v. t. 1. (Gun.) To make allowance for the dispart in (a gun), when taking aim. [ 1913 Webster ]

Every gunner, before he shoots, must truly dispart his piece. Lucar. [ 1913 Webster ]

2. (Gun.) To furnish with a dispart sight. [ 1913 Webster ]

n., a small apartment{ 4 }, sometimes furnished, with minimal kitchen and bath facilities. The unit may comprise a single room plus a bathroom, and the kitchen facilities are often open to the main room, or may form a small niche in a corner. There are many variations of efficiency apartment, including some in which furnishings such as a bed may be pulled out from a wall recess and stored there again when not in use. Also called an efficiency. [ PJC ]

a. [ Pref. ep- + arterial. ] (Anat.) Situated upon or above an artery; -- applied esp. to the branches of the bronchi given off above the point where the pulmonary artery crosses the bronchus. [ 1913 Webster ]

‖n. [ Sp.; cf. L. spartum Spanish broom, Gr. &unr_;. ] (Bot.) A species of Spanish grass (Macrochloa tenacissima), of which cordage, shoes, baskets, etc., are made. It is also used for making paper. [ 1913 Webster ]