The Collaborative International Dictionary of English v.0.48:

Amiss \A*miss"\, n.
   A fault, wrong, or mistake. [Obs.]
   [1913 Webster]

         Each toy seems prologue to some great amiss. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Amiss \A*miss"\, adv. [Pref. a- + miss.]
   Astray; faultily; improperly; wrongly; ill.
   [1913 Webster]

         What error drives our eyes and ears amiss? --Shak.
   [1913 Webster]

         Ye ask and receive not, because ye ask amiss. --James
                                                  iv. 3.
   [1913 Webster]

   To take (an act, thing) amiss, to impute a wrong motive to
      (an act or thing); to take offense at; to take unkindly;
      as, you must not take these questions amiss.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Amiss \A*miss"\ ([.a]*m[i^]s"), a.
   Wrong; faulty; out of order; improper; as, it may not be
   amiss to ask advice.

   Note: [Used only in the predicate.] --Dryden.
         [1913 Webster]

               His wisdom and virtue can not always rectify that
               which is amiss in himself or his circumstances.
                                                  --Wollaston.
         [1913 Webster]

WordNet (r) 3.0 (2006):

amiss
    adv 1: away from the correct or expected course; "something has
           gone awry in our plans"; "something went badly amiss in
           the preparations" [syn: awry, amiss]
    2: in an improper or mistaken or unfortunate manner; "if you
       think him guilty you judge amiss"; "he spoke amiss"; "no one
       took it amiss when she spoke frankly"
    3: in an imperfect or faulty way; "The lobe was imperfectly
       developed"; "Miss Bennet would not play at all amiss if she
       practiced more"- Jane Austen [syn: imperfectly, amiss]
       [ant: perfectly]
    adj 1: not functioning properly; "something is amiss"; "has gone
           completely haywire"; "something is wrong with the engine"
           [syn: amiss(p), awry(p), haywire, wrong(p)]

Moby Thesaurus II by Grady Ward, 1.0:

136 Moby Thesaurus words for "amiss":
   aberrant, abroad, adrift, afield, all abroad, all off, all wrong,
   askew, astray, at fault, awry, bad, badly, below the mark,
   beside the mark, beside the point, blamable, blameful, bootlessly,
   bum, censurable, cockeyed, confused, convulsed, corrupt, crappy,
   culpable, deceptive, defective, delusive, deranged, deviant,
   deviational, deviative, disarranged, discomfited, discomposed,
   disconcerted, dislocated, disordered, disorderly, disorganized,
   dissatisfactory, distorted, disturbed, errant, erring, erroneous,
   erroneously, evil, evilly, fallacious, fallaciously, false,
   falsely, far from it, faultful, faultfully, faultily, faulty,
   flawed, fruitlessly, guilty, haywire, heretical, heterodox, ill,
   illogical, illusory, imperfect, imperfectly, improper, improperly,
   in disorder, in vain, inaccurately, inappropriately, incorrect,
   incorrectly, indiscreetly, inopportunely, misinterpret, misplaced,
   mistake, mistakenly, misunderstand, not right, not true, off,
   off the track, on the fritz, out, out of gear, out of joint,
   out of kelter, out of kilter, out of order, out of place,
   out of tune, out of whack, peccant, perturbed, perverse, perverted,
   poor, poorly, punk, reprehensible, roily, rotten,
   self-contradictory, shuffled, sick, sinful, straying,
   to no purpose, turbid, turbulent, unfactual, unfavorably, unholy,
   unorthodox, unpropitiously, unproved, unsatisfactory, unsettled,
   untoward, untrue, untruly, unwisely, up, upset, vainly, wide,
   wrong, wrongly