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Theme (music), the initial or principal melody in a musical piece

Theme (literature), the unifying subject or idea of a story

Theme (computing), a custom graphical appearance for certain software, similar to a skin

Theme (linguistics), that part of a sentence which indicates what is being talked about

Theme music, signature music which recurs in a film, television program or performance

Thema, an administrative district in the Byzantine Empire

Motif, a recurring theme or pattern in artwork

In philology, the inflexional base or stem of a word, consisting of the root with alteration or addition.

Themes (1989 album), a compilation album by Vangelis

Themes (2000 album), an album by Moravian ethno metal band Silent Stream Of Godless Elegy