n A sending or mission (to do or accomplish something).
n An official charge or authority to do something, often used of military officers.
n A body or group of people, officially tasked with carrying out a particular function. Eg: The European Commission, The Electoral Commission, The Federal Communications Commission.
n A fee charged by an agent or broker for carrying out a transaction. Eg: Reseller commission, Finder's fee.
n the act of committing (e.g. a crime)
n The name of a service provided to validate the completeness and accuracy of a project or venture.
v (transitive) To send or officially charge someone or some group to do something.
v (transitive) To place an order for (often piece of art); as, commission a portrait.
v (transitive) To put into active service; as, commission a ship.