Radio drama

form of art radio broadcasting, the radio transmission of a recording of a play or dramatization of a literary work

Radio drama (or audio drama, audio play, radio play, radio theatre, or audio theatre) is a dramatized, purely acoustic performance without visual elements. It is usually heard on radio or published as audiobook. Radio drama is often described as "cinema for the ears". It had its greatest popularity in the Golden Age of Radio, before television was introduced.

English Wiktionary
English Wiktionary
The English Wiktionary has a dictionary definition (meanings of a word) for: radio drama