/ Dictionary / Index C collimate: Meaning and Definition of Find definitions for: col•li•mate Pronunciation: (kol'u-māt"), [key] — -mat•ed, -mat•ing. to bring into line; make parallel. to adjust accurately the line of sight of (a telescope). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: collimate (Thesaurus) colligative collimator Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language