Definitions
1.nounSomeone who has control over something or someone.
2.nounThe owner of an animal or slave.
3.nounThe captain of a merchant ship; a master mariner.
4.nounThe head of a household.
5.nounSomeone who employs others.
6.nounAn expert at something."Mark Twain was a master of fiction."
7.nounA tradesman who is qualified to teach apprentices.
8.nounA schoolmaster.
9.nounA skilled artist.
10.nounA man or a boy; mister. See Master.
11.nounA master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree."She has a master in psychology."
12.nounA person holding such a degree."He is a master of marine biology."
13.nounThe original of a document or of a recording."The band couldn't find the master, so they re-recorded their tracks."
14.nounThe primary wide shot of a scene, into which the closeups will be edited later.
15.nounA parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings."The case was tried by a master, who concluded that the plaintiffs were the equitable owners of the property. [...]"
16.nounA device that is controlling other devices or is an authoritative source."a master database"
17.nounA person holding an office of authority, especially the presiding officer.
18.noun(by extension) A person holding a similar office in other civic societies.