theme
n//θiːm//tema
A subject, now especially of a talk or an artistic piece; a topic.
Any of various colors, or color palettes, in which a design is offered; (GUI) any of various skins for an app, affecting the visuals and perhaps other elements such as sound effects.
A recurring idea; a motif.
(music) The main melody of a piece of music, especially one that is the source of variations.