Definitions from Wiktionary ( )

▸ noun:  Someone who has control over something or someone.
▸ noun:  The owner of an animal or slave.
▸ noun:  (nautical) The captain of a merchant ship; a master mariner.
▸ noun:  (dated) A male head of a household.
▸ noun:  Someone who employs others.
▸ noun:  An expert at something.
▸ noun:  A tradesman who is qualified to teach apprentices.
▸ noun:  (dated) A male schoolteacher.
▸ noun:  A skilled artist.
▸ noun:  (dated) A man or a boy; mister. See Master.
▸ noun:  A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree.
▸ noun:  A person holding such a degree.
▸ noun:  The original of a document or of a recording.
▸ noun:  (film) The primary wide shot of a scene, into which the closeups will be edited later.
▸ noun:  (law) A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings.
▸ noun:  (engineering, computing) A device that is controlling other devices or is an authoritative source.
▸ noun:  (Freemasonry) A person holding an office of authority, especially the presiding officer.
▸ noun:  (by extension) A person holding a similar office in other civic societies.
▸ noun:  (BDSM) A male dominant.
▸ adjective:  Masterful.
▸ adjective:  Main, principal or predominant.
▸ adjective:  Highly skilled.
▸ adjective:  Original.
▸ verb:  (intransitive) To be a master.
▸ verb:  (transitive) To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue.
▸ verb:  (transitive) To learn to a high degree of proficiency.
▸ verb:  (transitive, obsolete) To own; to possess.
▸ verb:  (transitive, especially of a musical performance) To make a master copy of.
▸ verb:  (intransitive, usually with in) To earn a Master's degree.
▸ noun:  (nautical, in combination) A vessel having a specified number of masts.
▸ noun:  Prepended to a boy's name or surname as a (now somewhat formal) form of address.
▸ noun:  A religious teacher, often as an honorific title.
▸ noun:  The title of the head of certain colleges and schools.
▸ noun:  A master's degree.
▸ noun:  A person holding a master's degree, as a title.
▸ noun:  The title of the eldest son of a Scots lord.
▸ noun:  The owner of a slave, in some literature.
▸ noun:  (BDSM) Used as the title of a dominant.
▸ noun:  (Wicca) One of the triune gods of the Horned God in Wicca alongside the Father and Sage and representing a boy or a young man
▸ noun:  (banking) Mastercard
▸ noun:  Short for master key. [A key designed to open a set of several locks; a passkey.]

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