Dictionary definition · master
noun
- an artist of consummate skill"a master of the violin"
- a person who has general authority over others
- a combatant who is able to defeat rivals
- directs the work of others
- presiding officer of a school
- an original creation (i.e., an audio recording) from which copies can be made
- an officer who is licensed to command a merchant ship
verb
- be or become completely proficient or skilled in"She mastered Japanese in less than two years"
- get on top of; deal with successfully"He overcame his shyness"
- have dominance or the power to defeat over"Her pain completely mastered her"
- have a firm understanding or knowledge of; be on top of"Do you control these data?"
adjective
- most important element"the chief aim of living"
Source: Open English WordNet (CC BY 4.0).