() [, ]failure to do sth that is required by an agreement or by law, especially paying a debt违约（尤指拖欠债务）◆The country is trying to avoid a default on its foreign debt.这国家正试图避免拖欠外债。◆They are in default of their obligations.他们未履行义务。◆The risk of default is very high.违约风险相当高。◆loan defaults贷款拖欠 () [, ]what happens or appears if you do not make any other choice or change默认；系统设定值◆The default option is to save your work every five minutes.默认的选项是每五分钟贮存一次。◆What do you use as your default browser?你用什么浏览器作为默认浏览器？●by deˈfaultif something happens by default it happens because nothing has been done to make things happen differently or because sb has not done what they should have done自动地；默认地◆He became Chief Executive of the merged company almost by default.他几乎不费吹灰之力就当上了合并后公司的总裁。◆They won their lawsuit by default.他们很轻松地打赢了官司。judgement by/in default