[syn: sufficiency, adequacy]
The Collaborative International Dictionary of English v.0.48:
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.
      [1913 Webster]
            His sufficiency is such that he bestows and
            possesses, his plenty being unexhausted. --Boyle.
      [1913 Webster]
   2. Qualification for any purpose; ability; capacity.
      [1913 Webster]
            A substitute or most allowed sufficiency. --Shak.
      [1913 Webster]
            I am not so confident of my own sufficiency as not
            willingly to admit the counsel of others. --Eikon
                                                  Basilike.
      [1913 Webster]
   3. Adequate substance or means; competence. "An elegant
      sufficiency." --Thomson.
      [1913 Webster]
   4. Supply equal to wants; ample stock or fund.
      [1913 Webster]
   5. Conceit; self-confidence; self-sufficiency.
      [1913 Webster]
            Sufficiency is a compound of vanity and ignorance.
                                                  --Sir W.
                                                  Temple.
      [1913 Webster]
WordNet (r) 3.0 (2006):
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, sufficiency]
    3: the quality of being sufficient for the end in view; "he
       questioned the sufficiency of human intelligence" [syn:
       sufficiency, adequacy] [ant: deficiency, inadequacy,
       insufficiency]
Moby Thesaurus II by Grady Ward, 1.0:
37 Moby Thesaurus words for "sufficiency":
   ability, ableness, acceptability, adequacy, adequateness,
   admissibility, agreeability, caliber, capability, capableness,
   capacity, competence, efficacy, efficiency, facility, faculty,
   fairishness, fitness, flair, genius, goodishness, passableness,
   proficiency, qualification, satisfactoriness, sufficient,
   susceptibility, talent, tenability, the goods, the stuff,
   tolerability, tolerableness, unexceptionability,
   unobjectionability, viability, what it takes