1. depending on free oxygen or air (Freq. 1) - aerobic fermentation • Syn: aerophilic, aerophilous • Ant: anaerobic • Similar to: aerobiotic, oxidative 2. based on or using the principles of aerobics; enhancing respiratory and circulatory efficiency - aerobic dance - running is very aerobic • Ant: anaerobic • Derivationally related forms: aerobics