The Collaborative International Dictionary of English v.0.48:

Castrate \Cas"trate\, v. t. [imp. & p. p. Castrated; p. pr. &
   vb. n. Castrating.] [L. castrarus, p; p. of castrare to
   castrate, asin to Skr. [,c]astra knife.]
   1. To deprive of the testicles; to emasculate; to geld; to
      alter.
      [1913 Webster]

   2. To cut or take out; esp. to remove anything erroneous, or
      objectionable from, as the obscene parts of a writing; to
      expurgate.
      [1913 Webster]

            My . . . correspondent . . . has sent me the
            following letter, which I have castrated in some
            places.                               --Spectator.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

castrated \castrated\ adj.
   deprived of reproductive organs or sexual attributes.

   Syn: altered, neutered, unsexed, fixed.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

castrated
    adj 1: deprived of sexual capacity or sexual attributes [syn:
           castrated, unsexed] [ant: uncastrated]

Moby Thesaurus II by Grady Ward, 1.0:

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