Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One of a set of three identical objects or copies.
  • transitive verb To make threefold; triple.
  • transitive verb To make three identical copies of.

from The Century Dictionary.

  • To treble; repeat a second time; make threefold; produce a third corresponding to a first and second.
  • Triple; threefold; consisting of or related to a triad, or three corresponding parts; composed of three similars: as, a triplicate certificate.
  • noun One of three things corresponding in every respect to one another.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A third thing corresponding to two others of the same kind.
  • adjective Made thrice as much; threefold; tripled.
  • adjective (Math.) the ratio of the cubes of two quantities; thus, the triplicate ratio of a to b is a3: b3.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Each of a set of three identical objects or copies.
  • verb transitive To make three identical copies of something.
  • verb transitive To triple.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun one of three copies; any of three things that correspond to one another exactly
  • verb reproduce threefold

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From Middle English, triple, from Latin triplicātus, past participle of triplicāre, to triple, from triplex, triplic-, threefold; see triplex.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Early 15th century. From Latin triplicatus, form of triplicāre ("to triple"), from tri- ("three") + plicāre ("to fold").

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