1. The process of acquiring complete skill, knowledge, or proficiency in a particular subject or activity through practice and learning
She spent years gaining mastery over the violin.
Ela passou anos adquirindo domínio do violino.
2. Achieving expert-level competence or control over something
Gaining mastery of a new language requires consistent dedication.
Adquirir domínio de uma nova língua requer dedicação consistente.