(sank/sæŋk/, sunk/sʌŋk/or, less frequentsunk, sunk) [] if a ship sinks or sb/sth sinks it, it is damaged and goes below the surface of the sea下沉；沉没◆The tanker sank off the coast of Brittany.油轮在布列塔尼沿海沉没。 [] to decrease in amount, volume, strength, etc.下跌；减少；减弱◆The pound has sunk to its lowest recorded level against the dollar.英镑兑美元下跌至历史最低水平。●ˌsink sth ˈinto sthto spend a lot of money on a business, for example in order to make money from it in the future把大量资金投入◆We sank all our savings into the venture.我们把所有的积蓄都投入了这个企业。