TRIPLE

triple. Triple, a. treble, threefold, taken threetimes

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Tri″ple (?), a. [[L. triplus; tri- (see Tri-) + -plus, as in duplus double: cf. F. triple. See Double, and cf. Treble.]] 1. 1. Consisting of three united; multiplied by three; threefold; as, a triple knot; a triple tie.
By thy triple shape as thou art seen. Dryden. 2. 2. Three times repeated; treble. See Treble.
3. 3. One of three; third. Shak.
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.