1 a single thing which is complete in itself, although it can be part of sth larger 单元: The book is divided into ten units. 这本书分成十个单元。

2 a fixed amount or number used as a standard of measurement （计量或计数的）单位: a unit of currency 货币单位

3 a group of people who perform a certain function within a larger organization （组织的）单位，部门: the intensive care unit of a hospital 医院的特别护理组

4 a small machine that performs a particular task or that is part of a larger machine （机器的）组件，部件，组件: The heart of a computer is the central processing unit. 计算机的核心是中央处理机。

5 a piece of furniture that fits with other pieces of furniture and has a particular use （家具的）组合部件: matching kitchen units 配套的厨房设备 ☞picture on page C7 见C7页插图