The Collaborative International Dictionary of English v.0.48:
bodybuilding \bodybuilding\ n. exercise that builds muscles through tension. Syn: anaerobic exercise, musclebuilding. [WordNet 1.5]WordNet (r) 3.0 (2006):
bodybuilding n 1: exercise that builds muscles through tension [syn: bodybuilding, anaerobic exercise, muscle building, musclebuilding]