Around music, a theme is the initial or primary melody.

Inside film, television, and radio, theme music is a melody closely associated with a program.

Around literature, a theme is the unifying subject of the story.

Around computing, the theme is the custom graphic appearance surely computer software, similar to a skin.

In the Byzantine Empire, a thema was an administration and military enlisting territorial dominion.

Within philology, a theme is the inflexional base or stem of the word, consisting of the root with modification or addition.

Inside linguistics, a theme is that the portion of a phrase which indicates what is existence talked just about.