Ma'anar ƙamus na kalmar "deflator" wani ma'auni ne na ƙididdiga wanda ke daidaita farashin farashi don kwatanta ainihin kayan aiki na tattalin arziki ko samun kudin shiga daga lokaci zuwa lokaci. Ma'auni ne na raguwar ƙimar farashin kayayyaki da sabis na gabaɗaya a cikin tattalin arziƙi akan lokaci. Ana amfani da deflator sau da yawa a fannin tattalin arziki da kuɗi don ƙididdige ƙididdige ƙididdiga na gaske, irin su ainihin samfuran cikin gida (GDP), samun kudin shiga na gaske, ko ƙimar riba na gaske, wanda ke nuna nawa tattalin arzikin ya haɓaka ko raguwa bayan daidaitawa don tasirin hauhawar farashin kayayyaki.