1 [U] [C] (an) investment (in sth) the act of putting money in a bank, business, property, etc; the amount of money that you put in 投资；投资额: investment in local industry 投资于当地工业The company will have to make an enormous investmentto computerize production. 若要使生产计算机化，这家公司非得投入大量资金。

2 [C] (informal 非正式) a thing that you have bought 买回来的东西: This coat has been a good investment -- I've worn it for three years. 这件外衣买得合算，我已穿了三年。