definition of
master

[1] #1 master n. [maestro] an artist of consummate skill; "a master of the violin"; "one of the old masters". wn

[2] #2 master n. [overlord, lord] a person who has general authority over others. wn

[3] #3 master v. [get the hang] be or become completely proficient or skilled in; "She mastered Japanese in less than two years". wn

[4] #4 master v. [overcome, get over, subdue, surmount] get on top of; deal with successfully; "He overcame his shyness". wn

[5] #5 master v. [dominate] have dominance or the power to defeat over; "Her pain completely mastered her"; "The methods can master the problems". wn