Source : WordNet®

crossover
     n 1: the interchange of sections between pairing homologous
          chromosomes during the prophase of meiosis [syn: {crossing
          over}]
     2: a voter who is registered as a member of one political party
        but who votes in the primary of another party [syn: {crossover
        voter}]
     3: 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"
     4: a path (often marked) where something (as a street or
        railroad) can be crossed to get from one side to the other
        [syn: {crossing}, {crosswalk}]