
The age when a person acquires all the rights and responsibilities of being an adult. In most states, the age is 18.
Found on
http://www.lectlaw.com/def/a023.htm

Adulthood in the eyes of the law. After reaching the age of majority, a person is permitted to vote, make a valid will, enter into binding contracts, enlist in the armed forces, and purchase alcohol. Also, parents may stop making child support payments when a child reaches the age of majority. In most states the age of majority is 18, but this vari...
Found on
http://www.nolo.com/dictionary/age-of-majority-term.html
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