master

Adjective

• 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
    

Noun

• key that secures entrance everywhere

• an authority qualified to teach apprentices

• someone who holds a master's degree from academic institution

• an officer who is licensed to command a merchant ship

• an original creation (i.e., an audio recording) from which copies can be made

• presiding officer of a school

• directs the work of others

• a combatant who is able to defeat rivals

• a person who has general authority over others

• an artist of consummate skill
  • a master of the violin
    
  • one of the old masters
    

Verb

• have a firm understanding or knowledge of; be on top of
  • Do you control these data?
    

• have dominance or the power to defeat over
  • Her pain completely mastered her
    
  • The methods can master the problems
    

• get on top of; deal with successfully
  • He overcame his shyness
    

• be or become completely proficient or skilled in
  • She mastered Japanese in less than two years
    

Related words

• Synonyms: 
  chief(a) , main(a) , primary(a) , principal(a) , master(a) , passkey , passe-partout , master key , professional , captain , sea captain , skipper , master copy , original , headmaster , schoolmaster , victor , superior , overlord , lord , maestro , control , dominate , overcome , get over , subdue , surmo