price index

noun
🔊/ˈpraɪs ɪndeks/
🔊/ˈpraɪs ɪndeks/
(also retail price index, RPI)
[singular]
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  1. (in the UK) a list of the prices of some ordinary goods and services which shows how much these prices change each month居民消费价格指数;消费价格指数