/ Dictionary / Index P premature beat: Meaning and Definition of Find definitions for: pre'mature beat' Pronunciation: [key] — Med. Med. extrasystole. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. premature premature contraction Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language