Dictionary evangelistEnthusiastic advocate

noun

evangelist

ih-VAN-juh-list/ɪˈvændʒəlɪst/

A person who enthusiastically promotes a belief, product, or cause.

The solar-energy evangelist explains the model to interested listeners.

An animated adult promotes a solar-house model to attentive listeners.

Etymology

euangelistesGreekbringer of good news or preacher of the gospel

A gospel preacher became any zealous promoter of a belief, product, or cause.

More examples

She became an evangelist for public libraries.
The company hired a developer evangelist.

Forms

evangelist

Similar words

advocate: Supports a cause without necessarily preaching enthusiastically.
champion: Emphasizes active defense or promotion.