/ Dictionary / Index C colloquialism: Meaning and Definition of Find definitions for: col•lo•qui•al•ism Pronunciation: (ku-lō'kwē-u-liz"um), [key] — n. a colloquial expression. colloquial style or usage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: colloquialism (Thesaurus) colloquial colloquium Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language