/ɪgˈzɜ:ʃn; US -ɜ:rʒn ||; ɪgˈzɝʃən/noun [U] [C] using your body in a way that takes a lot of effort; sth that you do that makes you tired 劳累；令人劳累的工作: At his age physical exertion was dangerous. 他这个年纪，干重活很危险。I'm tired after the exertions of the past few days. 干了几天活儿，我累着呢。