【法】 法定年龄

[ noun ]
the age at which persons are considered competent to manage their own affairs
<noun.time>

Lawful \Law"ful\, a.
1. Conformable to law; allowed by law; legitimate; competent.

2. Constituted or authorized by law; rightful; as, the lawful
owner of lands.

{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"ful*ly}, adv. -- {Law"ful*ness}, n.