A person who delivers religious messages; a minister.

A person who advocates for a particular cause or idea.

एक विशेष कारण या विचार के लिए समर्थक

English Usage: He became a preacher for environmental awareness in his community.

Hindi Usage: वह अपने समुदाय में पर्यावरण जागरूकता के लिए एक उपदेशक बन गया।