The Collaborative International Dictionary of English v.0.48:

Breed \Breed\, v. i.
   1. To bear and nourish young; to reproduce or multiply
      itself; to be pregnant.
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            That they breed abundantly in the earth. --Gen.
                                                  viii. 17.
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            The mother had never bred before.     --Carpenter.
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            Ant. Is your gold and silver ewes and rams?
            Shy. I can not tell. I make it breed as fast.
                                                  --Shak.
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   2. To be formed in the parent or dam; to be generated, or to
      grow, as young before birth.
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   3. To have birth; to be produced or multiplied.
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            Heavens rain grace
            On that which breeds between them.    --Shak.
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   4. To raise a breed; to get progeny.
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            The kind of animal which you wish to breed from.
                                                  --Gardner.
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   To breed in and in, to breed from animals of the same stock
      that are closely related.
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