/ Dictionary / Index A Addington: Meaning and Definition of Find definitions for: Ad•ding•ton Pronunciation: (ad'ing-tun), [key] — n. 1757–1844, British statesman: prime minister 1801–04. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. adding machine addio* Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language