a person who saves money and puts it in a bank, etc. for future use 储蓄者；储户◆The increase in interest rates is good news for savers. 利率上升对储户是个好消息。
(often with another noun) something that helps you spend less money or use less of the thing mentioned 节省装置◆The program is easy to use and is a real time-saver. 这款程序很好用而且很省时间。