The Collaborative International Dictionary of English v.0.48:

Accuracy \Ac"cu*ra*cy\ (#; 277), n. [See Accurate.]
   The state of being accurate; freedom from mistakes, this
   exemption arising from carefulness; exact conformity to
   truth, or to a rule or model; precision; exactness; nicety;
   correctness; as, the value of testimony depends on its
   accuracy.
   [1913 Webster]

         The professed end [of logic] is to teach men to think,
         to judge, and to reason, with precision and accuracy.
                                                  --Reid.
   [1913 Webster]

         The accuracy with which the piston fits the sides.
                                                  --Lardner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

accuracy
    n 1: the quality of being near to the true value; "he was
         beginning to doubt the accuracy of his compass"; "the
         lawyer questioned the truth of my account" [syn:
         accuracy, truth] [ant: inaccuracy]
    2: (mathematics) the number of significant figures given in a
       number; "the atomic clock enabled scientists to measure time
       with much greater accuracy"

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "accuracy":
   absoluteness, attention to detail, attention to fact,
   care for truth, circumstantiality, conscientiousness, correctness,
   criticality, criticalness, definiteness, delicacy, detail,
   exactingness, exactitude, exactness, exquisiteness, faithfulness,
   faultlessness, fidelity, fineness, finicality, finicalness,
   finickiness, finickingness, flawlessness, fussiness, literalism,
   literality, literalness, mathematical precision, meticulousness,
   minuteness, minuteness of detail, niceness, nicety, particularity,
   particularness, perfection, preciseness, precisianism, precision,
   punctiliousness, punctuality, refinement, right, rightness,
   rigidity, rigidness, rigor, rigorousness, scrupulosity,
   scrupulousness, severity, specificity, strictness, subtlety,
   textualism, the letter



The Free On-line Dictionary of Computing (30 December 2018):

accuracy

    How close to the real value a measurement is.

   Compare precision.

   (1998-04-19)