[1] : The Collaborative International Dictionary of English v.0.48

lawful \law"ful\, a.
   1. conformable to law; allowed by law; legitimate; competent.
      1913 webster

   2. constituted or authorized by law; rightful; as, the lawful
      owner of lands.
      1913 webster

   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.
      1913 webster +pjc

   note: in some of the states, and for some purposes, a woman
         attains lawful age at eighteen. --abbott.

   syn: legal; constitutional; allowable; regular; rightful.

   usage: lawful, legal. lawful means conformable to the
          principle, spirit, or essence of the law, and is
          applicable to moral as well as juridical law. legal
          means conformable to the letter or rules of the law as
          it is administered in the courts; conformable to
          juridical law. legal is often used as antithetical to
          equitable, but lawful is seldom used in that sense. --
          law"fully, adv. -- law"fulness, n.
          1913 webster
see also:
lawful age legal age age of majority lawful legal law"fully 
law"fulness 

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