/ Dictionary / Index P prob: Meaning and Definition of Find definitions for: prob Pronunciation: (prob), [key] — n. Chiefly Brit. Slang. problem. prob. Pronunciation: [key] probable. probably. problem. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pro-am probabilism Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language