/ Dictionary / Index A aerosphere: Meaning and Definition of Find definitions for: aer•o•sphere Pronunciation: (âr'u-sfēr"), [key] — n. Aeron. atmosphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aerospace engineering aerostat Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language