index1/ˋIndɛks; ˈIndeks/n [C] 1 plural indexes an alphabetical list of names, subjects etc at the back of a book, with the numbers of the pages where they can be found〔书后的〕索引2 plural indexes a set of cards or a DATABASE with information in alphabetical order 卡片[资料库]索引3 plural indexes or indices /ˋIndə͵siz; ˈIndəsiːz or ˈIndIsiːz/something you can use to compare prices, costs etc or to measure changes〔用于比较价格﹑费用等的〕指数﹔〔量度变化的〕指标: an index of economic growth 经济增长指数