crossbreed /ˈkɹɑːsˌbɹiːd/verb 3noun 1forms 4 verb3 •To produce (an organism) by the mating of individuals of different breeds, varieties, or species; hybridize.Recalling the crossbreeding of the lakeside daisy, he insists, "If we hadn't polluted that population with Ohio plants it might have vanished. — 1988 •To mate so as to produce a hybrid; interbreed. •To mate (an organism) with another organism so as to produce a hybrid. noun1 •An organism produced by mating of individuals of different varieties or breeds.When I ask about these dogs, they are described to me as the local mutts, mongrels, pavement specials, crossbreeds. — 2001 formscrossbred · cross-breeding · crossbreeding · crossbreeds