Lawful /(?)/

Law·ful

Lawful

a.
  1. Conformable to law; allowed by law; legitimate; competent.
  2. Constituted or authorized by law; rightful; as, the lawful owner of lands.

Phrases & Compounds
Lawful age
the age when the law recognizes one's right of independent action; majority; -- generally the age of twenty-one years. Also called legal age or age of majority.