/ Dictionary / Index A Avalon Peninsula: Meaning and Definition of Find definitions for: Av'alon Penin'sula Pronunciation: [key] a peninsula in SE Newfoundland, in E Canada: surrounded on three sides by the Atlantic Ocean. ab. 3579 sq. mi. (9270 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Avalon avant-garde Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language