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.
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   2. That which is entire; the whole. --Bacon.
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The Collaborative International Dictionary of English v.0.48:

Entireness \En*tire"ness\, n.
   1. The state or condition of being entire; completeness;
      fullness; totality; as, the entireness of an arch or a
      bridge.
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            This same entireness or completeness. --Trench.
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   2. Integrity; wholeness of heart; honesty. [R.]
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            Entireness in preaching the gospel.   --Udall.
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   3. Oneness; unity; -- applied to a condition of intimacy or
      close association. [Obs.]
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            True Christian love may be separated from
            acquaintance, and acquaintance from entireness.
                                                  --Bp. Hall.
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WordNet (r) 3.0 (2006):

entireness
    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]