transitive. To cross in breeding, subject to cross-breeding. Also intransitive. rare.

intransitive. To sexually reproduce together, being of distinct breeds or ethnic groups; to interbreed.

intransitive. Of plants or animals of different stocks or species: To breed or propagate with each other. Also transitive in passive.

intransitive. Of an animal or plant: To produce hybrid offspring by crossing with another species or variety; to cross or interbreed.

intransitive. To perform an outcross or outcrosses; to introduce fresh blood; to breed with an unrelated individual.

intransitive. Biology. To reproduce by outbreeding.