Definitions for "LAWFUL"
Conformable to law; allowed by law; legitimate; competent.
conformable to or allowed by law; "lawful methods of dissent"
having a legally established claim; "the legitimate heir"; "the true and lawful king"
Compatible with the will of a judge having jurisdiction.
Constituted or authorized by law; rightful; as, the lawful owner of lands.
Keywords:  according, rule, custom, natural
according to custom or rule or natural law