[1] : The Collaborative International Dictionary of English v.0.48

bastardy \bas"tardy\, n.
   1. the state of being a bastard; illegitimacy.
      1913 webster

   2. the procreation of a bastard child. --wharton.
      1913 webster

[2] : WordNet (r) 2.0

bastardy
     n : the status of being born to parents who were not married
         syn: illegitimacy, bar sinister
see also:
illegitimacy bar sinister 

[3] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

bastardy, crim. law. the offence of begetting a bastard child.

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

bastardy, persons. the state or condition of a bastard. the law presumes 
every child legitimate, when born of a woman in a state of wedlock, and 
casts the onus probandi q. v. on the party who affirms the bastardy. 
stark. ev. h. t. 

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