A closet drama is a play that is not intended to be performed onstage, but read by a solitary reader or, sometimes, out loud in a small group. A related form, the “closet screenplay,” developed during the 20th century.

Theatre Dictionary Definitions of theatre terms, including closet drama.

Wikipedia Excellent discussion about the writing of closet dramas through history, with noted examples of the genre and a list of closet drama authors.

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