/ Dictionary / Index P pair annihilation: Meaning and Definition of Find definitions for: pair' annihila"tion Pronunciation: [key] annihilation (def. 3a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pair pair bond Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language