What is License?

License definition and meaning on Dictionary terms:
formal permission from a governmental or other constituted authority to do something, as to carry on some business or profession.
a certificate, tag, plate, etc., giving proof of such permission; official permit: a driver’s license.
permission to do or not to do something.
intentional deviation from rule, convention, or fact, as for the sake of literary or artistic effect: poetic license.
exceptional freedom allowed in a special situation.

excessive or undue freedom or liberty.
the legal right to use a patent owned by another.

verb (used with object), liA.censed,
to grant authoritative permission or license to.