definitions of master from wordnet

Noun

• S: (n) maestro, master (an artist of consummate skill) "a master of the violin"; "one of the old masters"
• S: (n) overlord, master, lord (a person who has general authority over others)
• S: (n) victor, master, superior (a combatant who is able to defeat rivals)
• S: (n) master (directs the work of others)
• S: (n) headmaster, schoolmaster, master (presiding officer of a school)
• S: (n) master, master copy, original (an original creation (i.e., an audio recording) from which copies can be made)
• S: (n) master, captain, sea captain, skipper (an officer who is licensed to command a merchant ship)
• S: (n) master (someone who holds a master's degree from academic institution)
• S: (n) master, professional (an authority qualified to teach apprentices)
• S: (n) passkey, passe-partout, master key, master (key that secures entrance everywhere)

Verb

• S: (v) master, get the hang (be or become completely proficient or skilled in) "She mastered Japanese in less than two years"
• S: (v) overcome, get over, subdue, surmount, master (get on top of; deal with successfully) "He overcame his shyness"
• S: (v) dominate, master (have dominance or the power to defeat over) "Her pain completely mastered her"; "The methods can master the problems"
• S: (v) master, control (have a firm understanding or knowledge of; be on top of) "Do you control these data?"

Adjective

• S: (adj) chief, main, primary, principal, master (most important element) "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"