retail price index
noun🔊/ˌriːteɪl ˈpraɪs ɪndeks/
🔊/ˌriːteɪl ˈpraɪs ɪndeks/
(also price index)
[singular] (abbreviation RPI)
(in the UK) a list of the prices of some ordinary goods and services which shows how much these prices change each month （英国）零售物价指数