WordRel.com

• a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other

  synonym	crossingcrosswalk
  hypernym	path
  hyponym	grade separationpedestrian crossingzebra crossing

• the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience

  domain topic	music genremusical genremusical style
  hypernym	adoptionborrowing

• a voter who is registered as a member of one political party but who votes in the primary of another party

  synonym	crossover voter
  hypernym	electorvoter

• the interchange of sections between pairing homologous chromosomes during the prophase of meiosis

  synonym	crossing over
  holo part	diplotene
  hypernym	biological processorganic process