v. i. [ imp. & p. p. Tripled p. pr. & vb. n. Tripling ] [ Cf. F. tripler. See Triple, a. ] To make threefold, or thrice as much or as many; to treble; as, to triple the tax on coffee. [ 1913 Webster ]

a. [ L. triplus; tri- (see Tri-) + -plus, as in duplus double: cf. F. triple. See Double, and cf. Treble. ] 1. Consisting of three united; multiplied by three; threefold; as, a triple knot; a triple tie. [ 1913 Webster ]

By thy triple shape as thou art seen. Dryden. [ 1913 Webster ]

2. Three times repeated; treble. See Treble. [ 1913 Webster ]

3. One of three; third. [ Obs. ] Shak. [ 1913 Webster ]

Triple crown, the crown, or tiara, of the pope. See Tiara, 2. --
Triple-expansion steam engine, a compound steam engine in which the same steam performs work in three cylinders successively. --
Triple measure (Mus.), a measure of tree beats of which first only is accented. --
Triple ratio (Math.), a ratio which is equal to 3. --
Triple salt (Chem.), a salt containing three distinct basic atoms as radicals; thus, microcosmic salt is a triple salt. --
Triple star (Astron.), a system of three stars in close proximity. --
Triple time (Mus.), that time in which each measure is divided into three equal parts. --
Triple valve, in an automatic air brake for railroad cars, the valve under each car, by means of which the brake is controlled by a change of pressure in the air pipe leading from the locomotive. [ 1913 Webster ]

a. Having three crowns; wearing the triple crown, as the pope. [ 1913 Webster ]

a. Having three heads; three-headed; as, the triple-headed dog Cerberus. [ 1913 Webster ]

n. [ From Triple. ] 1. A collection or combination of three of a kind; three united. [ 1913 Webster ]

2. (Poetry) Three verses rhyming together. [ 1913 Webster ]

3. (Mus.) A group of three notes sung or played in the tree of two. [ 1913 Webster ]

4. pl. Three children or offspring born at one birth. [ 1913 Webster ]

n. (Zool.) An edible fish (Lobotes Surinamensis) found in the warmer parts of all the oceans, and common on the southern and middle coasts of the United States. When living it is silvery gray, and becomes brown or blackish when dead. Its dorsal and anal fins are long, and extend back on each side of the tail. It has large silvery scales which are used in the manufacture of fancy work. Called also, locally, black perch, grouper, and flasher. [ 1913 Webster ]

a. (Mach.) Having three principal operative parts or motions, so as to produce a three-fold effect. [ Webster 1913 Suppl. ]