WordNet sense 1 (a legal document giving official permission to do something):

license, licence

WordNet sense 2 (large game fish; found in waters of the West Indies):

Trachinotus falcatus

WordNet sense 3 (make it possible through a specific action or lack of action for something to happen):

allow, let

WordNet sense 4 (the act of giving a formal (usually written) authorization):

permission

WordNet sense 5 (allow the presence of or allow (an activity) without opposing or prohibiting):

tolerate

WordNet sense 6 (consent to, give permission):

countenance