Definition of mastery in English:

mastery

Line breaks: mas|tery
Pronunciation: /ˈmɑːst(ə)ri
 
/

noun

[mass noun]

Origin

Middle English: from Old French maistrie, from maistre 'master'.

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Word of the day milord
Pronunciation: mɪˈlɔːd
noun
used to address an English nobleman