the interchange of sections between pairing homologous chromosomes during the prophase of meiosis. [WordNet 1.5]
a structure, such as a bridge, bearing a path for crossing over a river or highway. [PJC]
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. [PJC]
a member of one political party who votes for a candidate of another party; -- called also crossover voter. [PJC]
a U-shaped section of pipe which serves to pass one pipeline over another which is directly in its path. [PJC]