con·trac·tion kənˈtrakSH(ə)n noun 1. the process of becoming smaller. a shortening of the muscles occurring at intervals before and during childbirth. Scout, as we know him, had his first contraction in a corner table at Wendy’s. Two Frosties, two singles (one, no onions). Large fry. Extra ketchup. Could you ever adopt? a boyfriend asks