From The Collaborative International Dictionary of English v.0.48 [gcide]:
Least \Least\ (l[=e]st), a. [OE. last, lest, AS. l[=ae]sast,
l[=ae]sest, superl. of l[=ae]ssa less. See {Less}, a.] [Used
as the superlative of little.]
Smallest, either in size or degree; shortest; lowest; most
unimportant; as, the least insect; the least mercy; the least
space.
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Note: Least is often used with the, as if a noun.
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I am the least of the apostles. --1 Cor. xv.
9.
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{At least}, or {At the least}, at the least estimate,
consideration, chance, etc.; being no less than; hence, at
any rate; at all events; even. See {However}.
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He who tempts, though in vain, at least asperses
The tempted with dishonor. --Milton.
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Upon the mast they saw a young man, at least if he
were a man, who sat as on horseback. --Sir P.
Sidney.
{In least}, or {In the least}, in the least degree, manner,
etc. "He that is unjust in the least is unjust also in
much." --Luke xvi. 10.
{Least squares} (Math.), a method of deducing from a number
of carefully made yet slightly discordant observations of
a phenomenon the most probable values of the unknown
quantities.
Note: It takes as its fundamental principle that the most
probable values are those which make the sum of the
squares of the residual errors of the observation a
minimum.
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From The Collaborative International Dictionary of English v.0.48 [gcide]:
At \At\, prep. [AS. [ae]t; akin to OHG. az, Goth., OS., & Icel.
at, Sw. [*a]t, Dan. & L. ad.]
Primarily, this word expresses the relations of presence,
nearness in place or time, or direction toward; as, at the
ninth hour; at the house; to aim at a mark. It is less
definite than in or on; at the house may be in or near the
house. From this original import are derived all the various
uses of at. It expresses:
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1. A relation of proximity to, or of presence in or on,
something; as, at the door; at your shop; at home; at
school; at hand; at sea and on land.
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2. The relation of some state or condition; as, at war; at
peace; at ease; at your service; at fault; at liberty; at
risk; at disadvantage.
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3. The relation of some employment or action; occupied with;
as, at engraving; at husbandry; at play; at work; at meat
(eating); except at puns.
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4. The relation of a point or position in a series, or of
degree, rate, or value; as, with the thermometer at
80[deg]; goods sold at a cheap price; a country estimated
at 10,000 square miles; life is short at the longest.
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5. The relations of time, age, or order; as, at ten o'clock;
at twenty-one; at once; at first.
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6. The relations of source, occasion, reason, consequence, or
effect; as, at the sight; at this news; merry at anything;
at this declaration; at his command; to demand, require,
receive, deserve, endure at your hands.
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7. Relation of direction toward an object or end; as, look at
it; to point at one; to aim at a mark; to throw, strike,
shoot, wink, mock, laugh at any one.
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{At all}, {At home}, {At large}, {At last}, {At length}, {At
once}, etc. See under {All}, {Home}, {Large}, {Last} (phrase
and syn.), {Length}, {Once}, etc.
{At it}, busily or actively engaged.
{At least}. See {Least} and {However}.
{At one}. See {At one}, in the Vocabulary.
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Syn: {In}, {At}.
Usage: When reference to the interior of any place is made
prominent in is used. It is used before the names of
countries and cities (esp. large cities); as, we live
in America, in New York, in the South. At is commonly
employed before names of houses, institutions,
villages, and small places; as, Milton was educated at
Christ's College; money taken in at the Customhouse; I
saw him at the jeweler's; we live at Beachville. At
may be used before the name of a city when it is
regarded as a mere point of locality. "An English king
was crowned at Paris." --Macaulay. "Jean Jacques
Rousseau was born at Geneva, June, 28, 1712." --J.
Morley. In regard to time, we say at the hour, on the
day, in the year; as, at 9 o'clock, on the morning of
July 5th, in the year 1775.
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From WordNet (r) 3.0 (2006) [wn]:
at least
adv 1: if nothing else (`leastwise' is informal and `leastways'
is colloquial); "at least he survived"; "they felt--at
any rate Jim felt--relieved though still wary"; "the
influence of economists--or at any rate of economics--is
far-reaching" [syn: {at least}, {leastways}, {leastwise},
{at any rate}]
2: not less than; "at least two hours studying the manual"; "a
tumor at least as big as an orange" [syn: {at least}, {at the
least}] [ant: {at most}, {at the most}]
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