Quick definitions from WordNet (breed)

▸ noun:  a lineage or race of people
▸ noun:  a special variety of domesticated animals within a species ("He experimented on a particular breed of white rats")
▸ noun:  a special lineage ("A breed of Americans")
▸ noun:  half-caste offspring of parents of different races (especially of white and Indian parents)
▸ verb:  have young (animals) ("Pandas rarely breed in captivity")
▸ verb:  of plants or animals ("She breeds dogs")
▸ verb:  copulate with a female, used especially of horses
▸ verb:  call forth
▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9154)

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▸ Also see breed