/ Dictionary / Index E extended play: Meaning and Definition of Find definitions for: extend'ed play' Pronunciation: [key] a phonograph record of 45 r.p.m. that plays a longer time than the standard 45 r.p.m. record. Abbr.: EP Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extended order extended real number system Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language