||Cas*tra"to (?), n. [L., properly p. p. of castrare. See Castrate.] A male person castrated for the purpose of improving his voice for singing; an artificial, or male, soprano. Swift.

• A male who has been castrated, especially a male whose testicles have been removed before puberty in order to retain his soprano or alto voice
  
• A male soprano or alto voice produced by castration of the singer before puberty
  
• (literally) castrated; especially castrated prepubescently
  
• having, using, or containing the voice of a castrato (noun)
  
• originally composed for a castrato
       Nowadays, either women or countertenors take the castrato roles.
  
  Italian
• castrated; past participle of castrare