The Collaborative International Dictionary of English v.0.48:

Entirety \En*tire"ty\, n.; pl. Entireness. [OF. entieret['e].
   Cf. Integrity.]
   1. The state of being entire; completeness; as, entirely of
      interest. --Blackstone.
      [1913 Webster]

   2. That which is entire; the whole. --Bacon.
      [1913 Webster]

WordNet (r) 3.0 (2006):

entirety
    n 1: the state of being total and complete; "he read the article
         in its entirety"; "appalled by the totality of the
         destruction" [syn: entirety, entireness, integrality,
         totality]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "entirety":
   aggregate, all, allness, be-all and end-all, collectiveness,
   collectivity, completeness, complex, comprehensiveness, embodiment,
   entireness, everything, exhaustiveness, fullness, gross,
   inclusiveness, intactness, integer, integrality, integration,
   integrity, omneity, omnipresence, oneness, organic unity,
   perfection, pervasiveness, plenitude, solidarity, solidity, sum,
   sum total, thoroughness, total, totality, tote, ubiquity, unity,
   universality, whole, wholeness



Bouvier's Law Dictionary, Revised 6th Ed (1856):

ENTIRETY, or, ENTIERTIE. This word denotes the whole, in contradistinction
to moiety, which denotes the half part. A husband and wife, when jointly
seized of land, are seized by entireties and not "pur mie" as joint tenants
are. Jacob's Law Dict.; 4 Kent, 362; 2 Kent, 132; Hartv. Johnson, 3 Penna.
Law Journ. 350, 357.