Definition of the word LEGAL.
 acordnig to http://dictionary.reference.com/browse/legal
adjective

1.

permitted by law; lawful: Such acts are not legal.

2.

of or pertaining to law; connected with the law or its administration: the legal profession.

3.

appointed, established, or authorized by law; deriving authority from law.

4.

recognized by law rather than by equity.

5.

of, pertaining to, or characteristic of the profession of law or of lawyers: a legal mind.