[1] : The Collaborative International Dictionary of English v.0.48

acceptable \accept"able\ -se^pt".ab'l; 277, a. f.
   acceptable, l. acceptabilis, fr. acceptare.
   capable, worthy, or sure of being accepted or received with
   pleasure; pleasing to a receiver; gratifying; agreeable;
   welcome; as, an acceptable present, one acceptable to us.
   1913 webster

[2] : WordNet (r) 2.0

acceptable
     adj 1: worthy of acceptance or satisfactory; "acceptable levels of
            radiation"; "performances varied from acceptable to
            excellent" ant: unacceptable
     2: judged to be in conformity with approved usage; "acceptable
        english usage" syn: accepted
     3: meeting requirements; "the step makes a satisfactory seat"
        syn: satisfactory
     4: adequate for the purpose; "the water was acceptable for
        drinking"
see also:
unacceptable accepted satisfactory 

[3] : Moby Thesaurus II by Grady Ward, 1.0

73 moby thesaurus words for "acceptable":
   ok, adequate, admissible, adorable, agreeable, all right, alright,
   appetizing, attractive, average, bearable, better than nothing,
   commonplace, decent, delightful, desirable, eligible, endurable,
   enfranchised, enviable, exciting, fair, fairish, fit, fitted, good,
   good enough, goodish, grateful, gratifying, likable, lovable,
   moderate, mouth-watering, not amiss, not bad, not half bad,
   not so bad, okay, ordinary, passable, pleasant, pleasing,
   presentable, pretty good, provocative, qualified, respectable,
   satisfactory, satisfying, sufficient, suitable, supportable,
   taking, tantalizing, tempting, tenable, tidy, to be desired,
   tolerable, toothsome, unexceptionable, unexceptional,
   unimpeachable, unobjectionable, viable, welcome, winning,
   with voice, with vote, workmanlike, worth having, worthy

Acceptable >> A Words
Acceptable, definition of term: Acceptable
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Acceptable Use >> A Words
Acceptable Use, definition of term: Acceptable Use
acceptable+use_pag1.html