theme

A topic of discourse or discussion. synonym: subject.

A subject of artistic representation.

An implicit or recurrent idea; a motif.

A short composition assigned to a student as a writing exercise.

A recurring melodic element in a composition, especially a melody forming the basis of a set of variations.

A stem.

In astrology, a figure of nativity.

A subject or topic on which a person writes or speaks; anything proposed as a subject of discourse or discussion.