illegitimate illegitimate /ˌɪlɪˈdʒɪtəmɪt/

adjective

1. () Contrary to or forbidden by law  ( illicit , outlaw , outlawed , illegitimate , unlawful )
   contrary to or forbidden by law
    An illegitimate seizure of power
   an illegitimate seizure of power
    Illicit trade
   illicit trade
    An outlaw strike
   an outlaw strike
    Unlawful measures
   unlawful measures
   
2. Of marriages and offspring; not recognized as lawful  ( illegitimate )
   of marriages and offspring; not recognized as lawful
   

noun

1. The illegitimate offspring of unmarried parents  ( bastard , by-blow , illegitimate , illegitimate child , love child , whoreson )
   the illegitimate offspring of unmarried parents