A melody used to identify a performer or a dance band or radio/tv program WordNet 3.0 & Open English WordNet

Theme music is a musical composition which is often written specifically for radio programming, television shows, video games, or films and is usually played during the title sequence, opening credits, closing credits, and in some instances at some point during the program. Wikipedia

A piece often written specifically for a radio program, television program, video game or film, and usually played during the intro, opening credits or ending credits Wikipedia Disambiguation

Music often written specifically for a movie or TV show Wikidata

A song which accompanies a television or radio program, usually as an intro or outro. Wiktionary

A song accompanying a program. Wiktionary (translation)