I. cross ‧ breed 1 /ˈkrɒsbriːd $ ˈkrɒːs-/ BrE AmE verb ( past tense and past participle crossbred /-bred/) [intransitive and transitive]
if one breed of plant or animal crossbreeds with another, or if you crossbreed them, they breed, producing a new type of plant or animal
—crossbred /-bred/ adjective
II. crossbreed 2 BrE AmE noun [countable]
an animal or plant that is a mixture of breeds ⇨ hybrid