/ Dictionary / Index A aviation: Meaning and Definition of Find definitions for: a•vi•a•tion Pronunciation: (ā"vē-ā'shun, av"ē-), [key] — n. the design, development, production, operation, and use of aircraft, esp. heavier-than-air aircraft. military aircraft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aviation (Thesaurus) aviate aviation badge Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language