master
     n 1: an artist of consummate skill; "a master of the violin";
          "one of the old masters" [syn: {maestro}]
     2: a person who has general authority over others [syn: {overlord},
         {lord}]
     3: a combatant who is able to defeat rivals [syn: {victor}, {superior}]
     4: directs the work of other
     5: presiding officer of a school [syn: {headmaster}, {schoolmaster}]
     6: an original creation (i.e., an audio recording) from which
        copies can be made [syn: {master copy}, {original}]
     7: an officer who is licensed to command a merchant ship [syn:
        {captain}, {sea captain}, {skipper}]
     8: someone who holds a master's degree from academic
        institution
     9: an authority qualified to teach apprentices [syn: {professional}]
     10: key that secures entrance everywhere [syn: {passkey}, {passe-partout},
          {master key}]
     v 1: be or become completely proficient or skilled in; "She
          mastered Japanese in less than two years" [syn: {get the
          hang}]
     2: get on top of; deal with successfully; "He overcame his
        shyness" [syn: {overcome}, {get over}, {subdue}, {surmount}]
     3: have dominance or the power to defeat over; "Her pain
        completely mastered her"; "The methods can master the
        problems" [syn: {dominate}]
     4: have a firm understanding or knowledge of; be on top of; "Do
        you control these data?" [syn: {control}]
Source: WordNet® 2.0