/ Dictionary / Index A average deviation: Meaning and Definition of Find definitions for: av'erage devia'tion. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. average average life Related Content Daily Word Quiz: verbose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language