Dictionary
a•vi•a•tion
Pronunciation: (ā"vē-ā'shun, av"ē-), [key]—
n.
1. the design, development, production, operation, and use of aircraft, esp. heavier-than-air aircraft.
2. military aircraft.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.