The Collaborative International Dictionary of English v.0.48:

emasculated \emasculated\ adj.
   1. having the testicles removed; -- of a male animal.

   Syn: cut, gelded, sexless.
        [WordNet 1.5]

   2. deprived of virility, vigor, or manly character.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Emasculate \E*mas"cu*late\, v. t. [imp. & p. p. Emasculated;
   p. pr. & vb. n. Emasculating.] [L. emasculare; e + masculus
   male, masculine. See Male masculine.]
   1. To deprive of virile or procreative power; to castrate
      power; to castrate; to geld.
      [1913 Webster]

   2. To deprive of masculine vigor or spirit; to weaken; to
      render effeminate; to vitiate by unmanly softness.
      [1913 Webster]

            Luxury had not emasculated their minds. --V. Knox.
      [1913 Webster]

WordNet (r) 3.0 (2006):

emasculated
    adj 1: (of a male animal) having the testicles removed; "a cut
           horse" [syn: cut, emasculated, gelded]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "emasculated":
   asexual, bad, castrated, cold, crippled, debilitated,
   demasculinized, devitalized, disabled, effeminized, emasculate,
   enervated, eunuchized, frigid, frustrated, game, gelded, halt,
   halting, hamstrung, handicapped, hobbling, impotent, incapacitated,
   lame, limping, lustless, maimed, marrowless, nerveless, neuter,
   neutral, pithless, sexless, sinewless, spavined, unmanned,
   unnerved, unsexed, unsexual