/ Dictionary / Index P preventer: Meaning and Definition of Find definitions for: pre•vent•er Pronunciation: (pri-ven'tur), [key] — n. a person or thing that prevents. any of various lines set up to reinforce or relieve ordinary running or standing rigging. a line for preventing a sail from jibbing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prevent prevention Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language