1. Contrary to or forbidden by law
   "an illegitimate seizure of power";
   - illicit, outlaw, outlawed, unlawful
    
2. Of marriages and offspring; not recognized as lawful
   "In some societies, children born out of wedlock were considered illegitimate"

1. A child with parents that are not married to each other
   "The scandal erupted when news of the politician's illegitimate child became public";
   - by-blow [informal], love child [informal], illegitimate child [informal]

Derived forms: illegitimates

See also: adulterine, base [archaic], baseborn [archaic], bastardly [archaic], bent [Brit, informal], corrupt, crooked [informal], fatherless, illegal, invalid, lawfulness, lawless, left-handed, misbegot [archaic], misbegotten [archaic], outlaw, spurious [archaic], unauthorised [Brit], unauthorized, unlawful, wide-open, wrongful

Type of: issue [formal], offspring, progeny

Antonym: legitimate

Encyclopedia: Illegitimate