the subject of a talk, piece of writing, exhibition, etc.; a topic

the theme of the sermon was reverence

a show on the theme of waste and recycling

an idea that recurs in or pervades a work of art or literature

love and honour are the pivotal themes of the Hornblower books

a piece of music that frequently recurs in or accompanies the beginning and end of a film, television programme, or musical

the theme from The Love Boat

the Sex and the City theme tune

a theme song

a setting given to a restaurant, pub, or leisure venue, intended to evoke a particular country, historical period, culture, etc.

an Irish theme pub

the stem of a noun or verb; the part to which inflections are added, especially one composed of the root and an added vowel

any of the twenty-nine provinces in the Byzantine empire

give a particular theme or setting to (a leisure venue, event, etc.)

the amusement park will be themed as a Caribbean pirate stronghold