/ Dictionary / Index P prom: Meaning and Definition of Find definitions for: prom Pronunciation: (prom), [key] — n. a formal dance, esp. one held by a high school or college class at the end of an academic year. PROM Pronunciation: (prom), [key] — n. Computers. a memory chip whose contents can be programmed by a user or manufacturer for a specific purpose. Cf.[p(rogrammable) r(ead)-o(nly) m(emory)] prom. Pronunciation: [key] promontory. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prom (Thesaurus) prolusory promazine Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language