The Collaborative International Dictionary of English v.0.48:

Privative \Priv"a*tive\, n.
   [1913 Webster]
   1. That of which the essence is the absence of something.
      [1913 Webster]

            Blackness and darkness are indeed but privatives.
                                                  --Bacon.
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   2. (Logic) A term indicating the absence of any quality which
      might be naturally or rationally expected; -- called also
      privative term.
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   3. (Gram.) A privative prefix or suffix. See Privative, a.,
      3.
      [1913 Webster]