noun. (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids.
noun. reproduction by parents of different races (especially by white and non-white persons).
1. Noun, singular or mass Because of crossbreeding, Africanized honey bees look like other honey bees but are much larger. 2. Verb, gerund or present participle Some of this may be due to crossbreeding dogs who carry the gene for one or more health issues.