Definition from Wiktionary, the free dictionary
Alternative forms 
- (Commonwealth) licence (noun)
- A legal document giving official permission to do something; a permit.
- The legal terms under which a person is allowed to use a product, especially software.
- Even if you bought this product, it does NOT belong to you. You have a license to use it under the terms of this agreement, until you breach this agreement.
- Freedom to deviate deliberately from normally applicable rules or practices (especially in behavior or speech).
- Excessive freedom; lack of due restraint.
- An academic degree, the holder of which is called a licentiate, ranking slightly below doctorate, awarded by certain European and Latin-American universities.
Usage notes 
- In Commonwealth English, the noun is spelt licence and the verb is license.
- The spelling licence is not used for either part of speech in the United States.
legal document giving official permission to do something
legal terms of product usage
freedom to deviate from normally applicable rules or practices
- The act of giving a formal (usually written) authorization.
- It was decided to license Wikipedia under the GFDL.
- Authorize officially.
- I am licensed to practice law in this state.
Derived terms 
act of giving a formal authorization
- license in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- license in The Century Dictionary, The Century Co., New York, 1911