1 (used about economic activity, prices, etc) to fall suddenly and by a large amount （指经济活动、价格等）暴跌: Shares in BP slumped 33p to181p yesterday. 英国石油公司的股价昨天跌到181便士，暴跌了33便士。The newspaper's circulation has slumped by 30%. 报纸的发行量骤减了30%。

2 to fall or sit down suddenly when your body feels heavy and weak, usually because you are tired or ill 猛然倒下或坐下（通常因身体疲累或不适）