master

1. (n) Someone who has control over something or someone. 2. (n) The owner of an animal or slave. 3. (n) (nautical) The captain of a merchant ship; a master mariner. 4. (n) (dated) A male head of household. 5. (n) Someone who employs others. 6. (n) An expert at something. 7. (n) A tradesman who is qualified to teach apprentices. 8. (n) (dated) A male schoolteacher. 9. (n) A skilled artist. 10. (n) (dated) A man or a boy; mister. See Master. 11. (n) A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree. 12. (n) A person holding such a degree. 13. (n) The original of a document or of a recording. 14. (n) (by extension, music) The copyright in a sound recording. 15. (n) (film) The primary wide shot of a scene, into which the closeups will be edited later. 16. (n) (law) A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings. 17. (n) (engineering, computing) A device that is controlling other devices or is an authoritative source. 18. (n) (Freemasonry) A person holding an office of authority, especially the presiding officer. 19. (n) (by extension) A person holding a similar office in other civic societies. 20. (n) (BDSM) A male dominant. 21. (adj) Masterful. 22. (adj) Main, principal or predominant. 23. (adj) Highly skilled. 24. (adj) Original. 25. (v) (intransitive) To be a master. 26. (v) (transitive) To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. 27. (v) (transitive) To learn to a high degree of proficiency. 28. (v) (transitive, especially of a musical performance) To make a master copy of. 29. (v) (intransitive, usually with in) To earn a Master's degree. 30. (n) (nautical, in combination) A vessel having a specified number of masts. 31. (v) (transitive, obsolete) To own; to possess. 32. (n) Prepended to a boy's name or surname as a (now somewhat formal) form of address. 33. (n) A religious teacher, often as an honorific title. 34. (n) The title of the head of certain colleges and schools. 35. (n) A master's degree. 36. (n) A person holding a master's degree, as a title. 37. (n) The title of the eldest son of a Scots lord. 38. (n) The owner of a slave, in some literature. 39. (n) (BDSM) Used as the title of a dominant, especially a male one. 40. (n) (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. 41. (n) (banking) Mastercard 42. (n) Ellipsis of master key. [A key designed to open a set of several locks; a passkey.]