Breadcrumb Home > Dictionary Cite Meaning of slacks Find definitions for: slacks Pronunciation: (slaks), [key] — n. (used with a pl. v.) men's or women's trousers for informal wear. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: slacks (Thesaurus) slack-jawed slack suit Related Content Daily Word Quiz: parallax Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language