Verb

1. To sexually produce offspring.
2. Of animals, to mate.
3. To keep animals and have them reproduce in a way that improves the next generation’s qualities.
4. To arrange the mating of specific animals.

   She wanted to breed her cow to the neighbor's registered bull.

5. To propagate or grow plants trying to give them certain qualities.

   He tries to breed blue roses.

6. To make sure that one's young grow up to adulthood.
7. To yield or result in.

   Disaster breeds famine.

   familiarity breeds contempt.

Noun

1. All animals or plants of the same species or subspecies eg. a breed of tulip, a breed of animal.
2. A race or lineage.