Definition of mastery noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈmɑːstəri//
    ; NAmE NAmE//ˈmæstəri//
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  1. 1[uncountable, singular] mastery (of something) great knowledge about or understanding of a particular thing synonym command She has mastery of several languages. The orchestra is unrivalled in terms of technical mastery and sheer vitality.
  2. 2[uncountable] mastery (of/over somebody/something) control or power human mastery of the natural world He struggled for mastery over his emotions.
  3. Word OriginMiddle English: from Old French maistrie, from maistre ‘master’.Extra examples He acquired mastery of four languages. He plays the violin with technical mastery, but little feeling. He shows complete mastery of the instrument. The allied bombers had total mastery of the skies. The king had absolute mastery over the country. He argued that man’s mastery over nature was essential for human development.
See the Oxford Advanced American Dictionary entry: mastery