Meaning

noun the interchange of sections between pairing homologous chromosomes during the prophase of meiosis

noun a voter who is registered as a member of one political party but who votes in the primary of another party

noun the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience

originEtymology tree English cross overdeverb. English crossover Deverbal from cross over.

Etymology from Wiktionary, CC BY-SA 3.0