/ˈsʌkʃn ||; ˈsʌkʃən/noun [U] the action of removing air or liquid from a space or container so that sth else can be pulled into it or so that two surfaces can stick together 抽吸；使两平面因中间真空而紧贴在一起: A vacuum cleaner works by suction. 真空吸尘器通过抽吸原理操作。