/ Dictionary / Index U urine: Meaning and Definition of Find definitions for: u•rine Pronunciation: (yoor'in), [key] — n. the liquid-to-semisolid waste matter excreted by the kidneys, in humans being a yellowish, slightly acid, watery fluid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: urine (Thesaurus) urinate urine analysis Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language