1.(genetics) The interchange of sections between pairing homologous chromosomes during the prophase of meiosis.
2.A structure, such as a bridge, bearing a path for crossing over a river or highway.
3.Votes from members of one political party cast for candidates of another party; called also crossover vote; as, there was a high crossover in this election.
4.A member of one political party who votes for a candidate of another party; called also crossover voter.
5.(Plumbing) A U-shaped section of pipe which serves to pass one pipeline over another which is directly in its path.
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