1. 
[syn: deformed, distorted, ill-shapen, malformed, misshapen]
The Collaborative International Dictionary of English v.0.48:
Deform \De*form"\, v. t. [imp. & p. p. Deformed; p. pr. & vb.
   n. Deforming.] [L. deformare; de- + formare to form, shape,
   fr. forma: cf. F. d['e]former. See Form.]
   1. To spoil the form of; to mar in form; to misshape; to
      disfigure.
      [1913 Webster]
            Deformed, unfinished, sent before my time
            Into this breathing world.            --Shak.
      [1913 Webster]
   2. To render displeasing; to deprive of comeliness, grace, or
      perfection; to dishonor.
      [1913 Webster]
            Above those passions that this world deform.
                                                  --Thomson.
      [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Deformed \De*formed"\, a.
   Unnatural or distorted in form; having a deformity;
   misshapen; disfigured; as, a deformed person; a deformed
   head. -- De*form"ed*ly, adv. -- De*form"ed*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
deformed
    adj 1: so badly formed or out of shape as to be ugly; "deformed
           thalidomide babies"; "his poor distorted limbs"; "an ill-
           shapen vase"; "a limp caused by a malformed foot";
           "misshapen old fingers" [syn: deformed, distorted,
           ill-shapen, malformed, misshapen]
Moby Thesaurus II by Grady Ward, 1.0:
73 Moby Thesaurus words for "deformed":
   abnormal, awry, bandy, bandy-legged, baroque, bent, bizarre,
   blemished, bloated, bowlegged, cacogenic, checked, cicatrized,
   club-footed, contorted, cracked, crazed, crippled, crooked,
   defaced, defective, disfigured, distorted, dwarfed, faulty,
   flatfooted, flawed, freak, freakish, gargoylish, gnarled,
   grotesque, ill-made, ill-proportioned, ill-shaped, keloidal,
   kinked, knock-kneed, lame, malformed, marred, misbegotten,
   misproportioned, misshapen, monstrous, mutilated, out of shape,
   perverted, pigeon-toed, pimpled, pimply, pug-nosed, rachitic,
   rickety, rococo, scabbed, scabby, scarified, scarred, shapeless,
   simous, snub-nosed, split, stumpy, swaybacked, talipedic, teratic,
   teratogenic, teratoid, truncated, twisted, unshapely, warped