ˈkɹɔsɪŋ ˈkɹɒsɪŋ a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience a jazz-classical crossover album a voter who is registered as a member of one political party but who votes in the primary of another party the interchange of sections between pairing homologous chromosomes during the prophase of meiosis