theme music
noun🔊/ˈθiːm mjuːzɪk/
🔊/ˈθiːm mjuːzɪk/
[uncountable] (also theme, theme song, theme tune [countable])
music that is played at the beginning and end and/or is often repeated in a film, television programme, etc. （电影、电视节目的）主题音乐