Bastard definition, a person born of unmarried parents;An illegitimate baby, child, or adult 5 something irregular, abnormal, or inferior 6 a hybrid,A spurious or illegitimate son bastard Thayer's Definition 1) illegitimate, bastard 2) one born, not in lawful wedlock, but of a concubine or female slave Encyclopedia Britannica offspring of parents that differ in
Words In Time And Place Exploring Language Through The Historical Thesaurus Of The Oxford English Dictionary Brooklyn Public Library