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English definition of “theme”

theme

noun     /θiːm/
B2 [C] the subject of a book, film, speech, etc: The theme of loss runs through most of his novels.Topics and areas of interest
theme music/song/tune the music that is played at the beginning and end of a particular television or radio programmeTypes of songs
(Definition of theme noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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