Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

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

Source : WordNet®

castrate
     n : a man who has been castrated and is incapable of
         reproduction; "eunuchs guarded the harem" [syn: {eunuch}]
     v 1: deprive of strength or vigor; "The Senate emasculated the
          law" [syn: {emasculate}]
     2: edit by omitting or modifying parts considered indelicate;
        "bowdlerize a novel" [syn: {bowdlerize}, {bowdlerise}, {expurgate},
         {shorten}]
     3: remove the testicles of a male animal [syn: {emasculate}, {demasculinize},
         {demasculinise}]
     4: remove the ovaries of; "Is your cat spayed?" [syn: {alter},
        {neuter}, {spay}]