Source : Webster's Revised Unabridged Dictionary (1913)

Entirety \En*tire"ty\, n.; pl. {Entireness}. [OF. entieret['e].
   Cf. {Integrity}.]
   1. The state of being entire; completeness; as, entirely of
      interest. --Blackstone.

   2. That which is entire; the whole. --Bacon.

Source : WordNet®

entirety
     n : the state of being total; "appalled by the totality of the
         destruction" [syn: {entireness}, {totality}]