/ˈmɑ:stəri ||; ˈmæstərɪ/noun[U] 1 mastery (of sth) great skill at doing sth 熟练；精通: His mastery of the violin was quite exceptional for a child. 以他这个年纪的孩子来说，他拉小提琴的熟练程度已很突出。
2 mastery (of/over sb/sth) control over sb/sth 控制；驾驭: The battle was fought for mastery of the seas. 这场战役是为了争夺制海权而进行的。