/ Dictionary / Index A avn.: Meaning and Definition of Find definitions for: avn. Pronunciation: [key] aviation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Avlona A-V node Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language