/ˈvækjuəm ||; ˈvækjυəm/noun[C] 1 a space that is completely empty of all substances, including air or other gases 真空: vacuum-packed foods (= in a pack from which the air has been removed) 真空包装的食品
2 [usu.sing] a situation from which sth is missing or lacking 缺少某物的情况;空虚
3 (informal 非正式)=VACUUM CLEANER
4 [usu.sing] the act of cleaning sth with a vacuum cleaner 用真空吸尘器打扫: to give a room a quick vacuum 用吸尘器打扫一下房间