jaw/dʒɔ; dʒɔː/n [C] 1 one of the two bones in your face that contain your teeth 颌﹐颚: She suffered a broken jaw in the accident. 她在事故中撞断了颌骨。upper/lower jaw 上颌/下颌see picture on page 见 A3 页图2 the bottom part of your face, below your mouth 下颚﹐下巴3 sb's jaw dropped used to say that someone looked very surprised or shocked 某人张口结舌﹐某人目瞪口呆〔用来形容极其惊讶或震惊〕