The lawful grant of a right to do something which would otherwise be illegal or wrongful. It may be gratuitous, contractual or coupled with an interest in land. The grantor of license is the licensor and the grantee is the licensee. A gratuitous (“mere” or “bare”) license can always be revoked (ie. cancelled), but revocability of a contractual license depends on the terms of the contract. A license coupled with an interest in land may be irrevocable and unlike the other two categories, may be binding on successors in title of the licensor.