expedition /ˌekspiˈdiʃən/ n. 1.［u］远征，探险，考察: go on expedition 去远征/探险/考察; make expedition to the South Pole 去南极考察 2.［c］远征队，探险队，考察队：a mountaineering expedition 登山队；dispatch an expedition 派遣一支远征队 3.［c］(短程)旅游，郊游：a pleasant expedition 愉快的郊游