license

license is a Noun

Definition:

[1] Authority or liberty given to do or forbear any act; especially, a formal permission from the proper authorities to perform certain acts or to carry on a certain business, which without such permission would be illegal; a grant of permission; as, a license to preach, to practice medicine, to sell gunpowder or intoxicating liquors. To have a license and a leave at London to dwell. P. Plowman.

[2] The document granting such permission. Addison.

[3] Excess of liberty; freedom abused, or used in contempt of law or decorum; disregard of law or propriety. License they mean when they cry liberty. Milton.

[4] That deviation from strict fact, form, or rule, in which an artist or writer indulges, assuming that it will be permitted for the sake of the advantage or effect gained; as, poetic license; grammatical license, etc.