default /diˈfɔ:lt/ I. n.［c］&［u］1.不履行；违约；拖欠；不参加（比赛）：be in default不履行（责任等）；a default in an engagement违约She lost the tennis match by default.她因不出场而输了这场网球赛。2.欠缺；玩忽，怠职：owing to default of oil 由于缺乏石油 He was dismissed by default of duty. 他因玩忽职守而被解雇了。in default of 缺少：in default of experienced workers 缺乏有经验的工人‖II.vi. & vt.1.不履行；拖欠：The company has defaulted on its payments for the goods. 该公司拖欠货款。2. 不到案；不出场；在（比赛）中不终场：They defaulted in the tennis tournament.在网球赛中他们没有出场。