(; ) (about a bond, an insurance policy, etc.) to reach the date when it must be paid or paid back （债券、保单等）到期◆When the bonds mature, the principal invested will be repaid. 债券到期时，将偿还所投资的本金。◆She has a number of investments maturing at the end of the year. 她拥有数项年底到期的投资产品。
(about an industry, a market, etc.) to stop growing as fast as before and become difficult for a new company to enter （产业、市场等）成熟，饱和◆Sales growth fell as our company and the market matured. 随着我们公司的成熟和市场的饱和，销售额趋於下降。◆Health club operators are finding themselves in a crowded and rapidly maturing sector of the market. 健身俱乐部经营者发现这是一个竞争激烈且快速饱和的市场板块。
to become more developed 成熟◆As companies mature and grow, they hire people for specific roles. 随着公司逐步成长，他们开始雇用人员从事特定的工作。◆The problems will be solved as the software matures. 随着软件的逐步成熟，这些问题将会得到解决。
(about a product, etc.) to become more difficult to sell or develop as it has been produced or used for a long time （产品等）老化◆maturing oil fields 老化的油田