2.Lacking in genuineness; spurious; false; adulterate; applied to things which resemble those which are genuine, but are really not so. "That bastard self-love which is so vicious in itself, and productive of so many vices."
3.Of an unusual or irregular make or proportion; as, a bastard musket; a bastard culverin. (Obs.)
4.(Print.) Abbreviated, as the half title in a page preceding the full title page of a book.
