Source : Webster's Revised Unabridged Dictionary (1913)

Integrity \In*teg"ri*ty\, n. [L. integritas: cf. F.
   int['e]grit['e]. See {Integer}, and cf. {Entirety}.]
   1. The state or quality of being entire or complete;
      wholeness; entireness; unbroken state; as, the integrity
      of an empire or territory. --Sir T. More.

   2. Moral soundness; honesty; freedom from corrupting
      influence or motive; -- used especially with reference to
      the fulfillment of contracts, the discharge of agencies,
      trusts, and the like; uprightness; rectitude.

            The moral grandeur of independent integrity is the
            sublimest thing in nature.            --Buckminster.

            Their sober zeal, integrity. and worth. --Cowper.

   3. Unimpaired, unadulterated, or genuine state; entire
      correspondence with an original condition; purity.

            Language continued long in its purity and integrity.
                                                  --Sir M. Hale.

   Syn: Honesty; uprightness; rectitude. See {Probity}.

Source : WordNet®

integrity
     n 1: an unreduced or unbroken completeness or totality [syn: {unity},
           {wholeness}]
     2: moral soundness