/ Dictionary / Index T trig function: Meaning and Definition of Find definitions for: trig' func"tion Pronunciation: [key] See trigonometric function. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Trigère trigger Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language