[countable, usually singular] an act of deciding not to do or continue to do sth because the situation has become too difficult（由于环境过于恶劣而）改变决定，退缩◆A tactical retreat from e-commerce would be best for us.从战术上退出电子商务对我们来说是最好的决定。 [singular; uncountable] a fall or decline in value跌价◆Investors are feeling the effects of the retreat in share prices.投资者正经受股价下跌之苦。 ● be in reˈtreatto become weaker, smaller, less successful, etc.变弱；变小；变得不太成功◆The hi-tech sector was in retreat.高科技部门节节败退。●go into reˈtreatto start to become less valuable or successful开始掉价；变得不太成功◆The Internet advertising business has gone into retreat.互联网广告业务不景气。