1 (used about a house, hotel room, seat, etc) not being used; empty （指房子、旅馆房间、座位等）空着的，未使用的

2 (used about a job in a company, etc) that is available for sb to take （指公司等的职位）空缺的: the ‘ Situations Vacant ’ page (= the page of a British newspaper where jobs are advertised) （英国报章的）“招聘广告”版

3 showing no sign of intelligence or understanding 失神的；茫然的: a vacant expression 茫然的表情 ➔vacantly adv She stared at him vacantly. 她茫然凝望着他。