Theme /(?)/

Theme

n.
  1. A subject or topic on which a person writes or speaks; a proposition for discussion or argument; a text.
    My theme is alway one and ever was.
    And when a soldier was the theme, my name Was not far off.
  2. Discourse on a certain subject.
    Then ran repentance and rehearsed his theme.
    — Piers Plowman.
    It was the subject of my theme.
  3. A composition or essay required of a pupil.
  4. A noun or verb, not modified by inflections; also, that part of a noun or verb which remains unchanged (except by euphonic variations) in declension or conjugation; stem. (Gram.)
  5. That by means of which a thing is done; means; instrument. [Obs.]
  6. The leading subject of a composition or a movement. (Mus.)