expel/Ikˋspɛl; Ikˈspel/v [I] expelled , expelling 1 to officially order someone to leave a school, organization, or country 开除﹔逐出﹔驱逐: expel sb from sth Jake was expelled from school for smoking. 杰克因抽烟而被学校开除。2 formal to force air, water, or gas out of something【正式】排出〔空气﹑水或气体〕