/ Dictionary / Index P prohibitive: Meaning and Definition of Find definitions for: pro•hib•i•tive Pronunciation: (prō-hib'i-tiv), [key] — adj. serving or tending to prohibit or forbid something. sufficing to prevent the use, purchase, etc., of something: prohibitive prices. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prohibitive (Thesaurus) Prohibition party prohibitory Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language