Lawful
King James Dictionary [1]
LAW'FUL, a.
1. Agreeable to law conformable to law allowed by law legal legitimate. That is deemed lawful which no law forbids, but many things are lawful which are not expedient. 2. Constituted by law rightful as the lawful owner of lands.
Webster's Dictionary [2]
(1): ( a.) Constituted or authorized by law; rightful; as, the lawful owner of lands.
(2): ( a.) Conformable to law; allowed by law; legitimate; competent.
International Standard Bible Encyclopedia [3]
lô´fool (usually משׁפּט , mishpāṭ , "relating to judgment," or "a pronounced judgment" צדּיק , caddı̄ḳ , "relating to that which is righteous" or "just"; ἔξεστι , éxesti , εὔνομος , eúnomos , "that which is authorized according to law," or "a privilege according to legitimate custom" (compare Ezekiel 18:5 , Ezekiel 18:19 , Ezekiel 18:21 , Ezekiel 18:27; Isaiah 49:24; Matthew 12:10; Acts 16:21; Acts 19:39 )): Used of persons: of God, as being righteous both in the punishment of the wicked and the rewarding of the righteous ( Psalm 145:17 Hebrew); of man, as being just and equitable in all his dealings with his fellow-man ( Ezekiel 33:19 ). It is used of things when the same are in accord with a pronounced judgment or a declared will of God, and thus pleasing in His sight ( Mark 3:4 ). When the course of individual conduct is according to God's law of righteousness, it is declared to be "lawful" ( Ezekiel 33:19 ). The word is used in a forensic sense as declaring the legal status of a person conforming to law. The idea of straightness , rigid adherence to God's law, whether religious, civil or ceremonial, cannot be excluded from the definition of the word "lawful."
Neither the King James Version nor the American Standard Revised Version is consistent in its translation of the Hebrew and Greek words translated "lawful." Ofttimes the words "just" and "righteous" are used. To arrive at the full and proper meaning of "lawful," therefore, it is necessary that we study the passages containing these synonymous terms. The written Law of God is the recognized standard by which things, actions and persons are to be judged as being lawful or unlawful.