The Collaborative International Dictionary of English v.0.48:

Significance \Sig*nif"i*cance\, Significancy \Sig*nif"i*can*cy\,
   n. [L. significantia.]
   1. The quality or state of being significant.
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   2. That which is signified; meaning; import; as, the
      significance of a nod, of a motion of the hand, or of a
      word or expression.
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   3. Importance; moment; weight; consequence.
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            With this brain I must work, in order to give
            significancy and value to the few facts which I
            possess.                              --De Quincey.
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