an alphabetical list, such as one printed at the back of a book showing which page a subject, name, etc. is on

Try looking up "heart disease" in the index. 试试在索引中寻找“心脏病”这个条目。

a collection of information stored on a computer or on a set of cards, in alphabetical order

He still has all his friends' names and addresses on a card index. 他仍然使用卡片索引记录所有朋友的姓名及地址。

a system of numbers used for comparing values of things that change according to each other or a fixed standard

the FTSE 100 Index 伦敦《金融时报》指数

the Dow Jones Index 道‧琼斯指数

a wage/price index 工资／价格指数

something that shows how strong or common a condition or feeling is

Consumer spending is often a good index of public confidence in the economy. 消费支出经常是显示公众对经济的信心的有效指标。

to prepare an index for a book or collection, or arrange it in an index

Our computer indexes several thousand new records every second. 我们的计算机每秒钟可把几千个新记录编入索引。

The book contains a lot of information, but it's not very well indexed. 这本书的信息很丰富，但索引做得不好。

to change a system of numbers according to each other or a fixed standard

Living expenses will be indexed to/in line with inflation (= to take inflation into consideration). 生活费用将与通货膨胀挂钩。