A person who carries out the duties of an office, performs a requisite task, etc. Also: a person who dispenses justice.
A person who has certain functions or duties to perform; an official, esp. one with a relatively low level of responsibility or authority.
A person who ministers (in various senses of the verb).
transferred. A member of a political party in any country, who is responsible for the execution of policy; a functionary of a public or private…