/ Dictionary / Index R rotter: Meaning and Definition of Find definitions for: rot•ter Pronunciation: (rot'ur), [key] — n. Chiefly Brit. Slang. a thoroughly bad, worthless, or objectionable person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rotter (Thesaurus) rottenstone Rotterdam Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language