Real Dictionary

breed
You can refer to someone or something as one of a particular breed of person or thing when you want to talk about what they are like.
countable noun: A breed of a pet animal or farm animal is a particular type of it. For example, terriers are a breed of dog.
verb: If you breed animals or plants, you keep them for the purpose of producing more animals or plants with particular qualities, in a controlled way.
verb: If you say that something breeds bad feeling or bad behaviour, you mean that it causes bad feeling or bad behaviour to develop.
verb: When animals breed, they have babies.

breed in American English
to bring forth (offspring) from the womb or hatch (young) from the egg
intransitive verb: to produce offspring
noun: a relatively homogenous group of animals within a species, developed and maintained by humans
transitive verb: to produce (offspring); procreate; engender

breed in British English
noun: a group of organisms within a species, esp a group of domestic animals, originated and maintained by humans and having a clearly defined set of characteristics
verb: to bear (offspring)