Definition of bastardy in English:

bastardy

noun

mass nounderogatory, archaic
  • 1The state of being born to parents who are not married to each other; illegitimacy.

    ‘while bastardy was not always a bar to succession, it certainly made things more difficult’
    1. 1.1 The action of fathering an illegitimate child or children.
      ‘a man charged with bastardy might be ordered to marry the child's mother’

Pronunciation

bastardy

/ˈbɑːstədi/