n 1: becoming proficient in the use of something; having mastery of; "his mastering the art of cooking took a long time" 2: the act of making a master recording from which copies can be made; "he received a bill for mastering the concert and making 100 copies"
Master Mas"ter, v. t. [imp. & p. p. Mastered; p. pr. vb. n. Mastering.] 1. To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. Obstinacy and willful neglects must be mastered, even though it cost blows. --Locke. 2. To gain the command of, so as to understand or apply; to become an adept in; as, to master a science. 3. To own; to posses. [Obs.] The wealth That the world masters. --Shak.