Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Noun
S: (n) mastering (becoming proficient in the use of something; having mastery of) "his mastering the art of cooking took a long time"
S: (n) mastering (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"
Verb
S: (v) master, get the hang (be or become completely proficient or skilled in) "She mastered Japanese in less than two years"