mastering

Noun mastering has 2 senses

• mastering(n = noun.cognition) - becoming proficient in the use of something; having mastery of; "his mastering the art of cooking took a long time"
is a kind of education
Derived form verb master₁

• mastering(n = noun.act) - 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"
is a kind of recording, transcription