an·aer·o·bic I. \|anə|rōbik; |aˌna(a)(ə)|r-, |aˌne(ə)|r-, |aˌnāə|r-\adjective alsoan·er·o·bic\|anə|r-\ Etymology:anaerobe + -ic 1.: living or active in the absence of free oxygen 2.: relating to or induced by anaerobes • an·aer·o·bi·cal·ly\-bə̇k(ə)lē\adverb II. adjective : of, relating to, or being activity in which the body incurs an oxygen debt < anaerobic exercise > < an anaerobic workout > < anaerobic sports > • anaerobicallyadverb