/ Dictionary / Index M mobster: Meaning and Definition of Find definitions for: mob•ster Pronunciation: (mob'stur), [key] — n. a member of a criminal mob. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mobster (Thesaurus) mobocracy Mobutu Sese Seko Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language