Source : Webster's Revised Unabridged Dictionary (1913)

Sufficiency \Suf*fi"cien*cy\, n. [L. sufficientia: cf. F.
   suffisance. See {Suffice}.]
   1. The quality or state of being sufficient, or adequate to
      the end proposed; adequacy.

            His sufficiency is such that he bestows and
            possesses, his plenty being unexhausted. --Boyle.

   2. Qualification for any purpose; ability; capacity.

            A substitute or most allowed sufficiency. --Shak.

            I am not so confident of my own sufficiency as not
            willingly to admit the counsel of others. --Eikon
                                                  Basilike.

   3. Adequate substance or means; competence. ``An elegant
      sufficiency.'' --Thomson.

   4. Supply equal to wants; ample stock or fund.

   5. Conceit; self-confidence; self-sufficiency.

            Sufficiency is a compound of vanity and ignorance.
                                                  --Sir W.
                                                  Temple.

Source : WordNet®

sufficiency
     n 1: sufficient resources to provide comfort and meet
          obligations; "her father questioned the young suitor's
          sufficiency"
     2: an adequate quantity; a quantity that is large enough to
        achieve a purpose; "enough is as good as a feast"; "there
        is more than a sufficiency of lawyers in this country"
        [syn: {enough}]
     3: the quality of being sufficient for the end in view; "he
        questioned the sufficiency of human intelligence" [syn: {adequacy}]
        [ant: {insufficiency}, {insufficiency}]