GNU Collaborative International Dictionary of English

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Found one definition

1.       
   crossover n.
   1. (genetics) the interchange of sections between pairing homologous chromosomes during the prophase of meiosis.
   
   Syn. -- crossing over.
   
   [WordNet 1.5]
   
   
   2. a structure, such as a bridge, bearing a path for crossing over a river or highway.
   
   [PJC]
   
   
   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”.
   
   [PJC]
   
   
   4. a member of one political party who votes for a candidate of another party; -- called also crossover voter.
   
   [PJC]
   
   
   5. (Plumbing) a U-shaped section of pipe which serves to pass one pipeline over another which is directly in its path.
   
   [PJC]