Definition of "bodybuilding"
A sport in which the aesthetics of muscular development is the basis for competition.
Quotations
Like those activities, bodybuilding is an obsession, a living (for a few), and a way of life for the people involved in it—a subculture, in a word, with its own values, aesthetics and vocabulary.
1974, Charles Gaines, George Butler, Pumping Iron: The Art and Sport of Bodybuilding, page 7