Source : Webster's Revised Unabridged Dictionary (1913)

Prematurity \Pre`ma*tu"ri*ty\, n. [Cf. F. pr['e]maturit['e].]
   The quality or state of being premature; early, or untimely,
   ripeness; as, the prematurity of genius.

Source : WordNet®

prematurity
     n : the state of being premature [syn: {prematureness}]