/ Dictionary / Index A autorotation: Meaning and Definition of Find definitions for: au•to•ro•ta•tion Pronunciation: (ô"tō-rō-tā'shun), [key] — n. Aeron. the condition of flight occurring when lift is derived solely from the action of air upon the unpowered rotor of a moving helicopter or autogiro. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. autoregulation autoroute Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language