1 [countable]A the change a popular performer makes from working in one area of entertainment to another :
J-Lo has made a crossover from music to the movies.
J-Lo has made a crossover from music to the movies.2 [uncountable and countable] the fact of liking, using, or supporting different types of things or groups :
There's some crossover between the musical genres.
There's some crossover between the musical genres.
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