The Collaborative International Dictionary
Significance \Sig*nif"i*cance\, Significancy \Sig*nif"i*can*cy\, n. [L. significantia.]
The quality or state of being significant.
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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Importance; moment; weight; consequence.
With this brain I must work, in order to give significancy and value to the few facts which I possess.
--De Quincey.
Wiktionary
n. (context dated English) significance
Usage examples of "significancy".
Not the prevalence, then, but the significancy of the nickname is to be noted here.
It must be noted that this flattening of the head has something in it of aristocratical significancy, like the crippling of the feet among the Chinese ladies of quality.