Theme

• In music, a theme is the initial or primary melody.

• In film, television, and radio, theme music is a melody closely associated with the program.

• In literature, a theme is the unifying subject of the story.

• In philology, a theme is a root word.

• In computing, a theme is a custom graphical appearance for certain software, similar to a skin.

• In the medieval Byzantine Empire, a thema was an administration and military recruitment district.