theme song

main song representing something

The phrase theme music usually refers to that of a radio program, television program, or movie. It is a piece that is written specifically for that show and usually played during the title sequence and/or end credits. If it is accompanied by lyrics, most often associated with the show, it is a theme song.
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Noun
1. a melody used to identify a performer or a dance band or radio/tv program
(synonym) signature, signature tune
(hypernym) tune, melody, air, strain, melodic line, line, melodic phrase
2. a melody that recurs and comes to represent a musical play or movie
(hypernym) tune, melody, air, strain, melodic line, line, melodic phrase

Synonyms and related words:
Brautlied, Christmas carol, Kunstlied, Liebeslied, Volkslied, alba, anthem, art song, aubade, ballad, ballade, ballata, barcarole, blues, blues song, boat song, bridal hymn, brindisi, calypso, canso, canticle, canzone, canzonet, canzonetta, carol, cavatina, chanson, chant, chantey, croon, croon song, dirge, ditty, drinking song, epithalamium, folk song, hymeneal, lay, lied, lilt, love song, love-lilt, matin, minstrel song, minstrelsy, national anthem, prothalamium, serena, serenade, serenata, signature, song, torch song, war song, wedding song
  

theme song /'θi:msɔɳ/
danh từ bài hát chủ đề ((thường) nhắc đi nhắc lại trong một cuốn phim để làm bật chủ đề) rađiô bài hát dạo, khúc nhạc hiệu ((thường) nhắc đi nhắc lại ở trên đài mỗi khi đến một buổi phát thanh nào đó)
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