/ Dictionary / Index A aerobe: Meaning and Definition of Find definitions for: aer•obe Pronunciation: (âr'ōb), [key] — n. an organism, esp. a bacterium, that requires air or free oxygen for life (opposed to anaerobe). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aerobe (Thesaurus) aerobatics Aerobee Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language