25B6; noun EXPERT, master, wizard, genius, old hand, veteran, maestro, connoisseur, authority, grandmaster; informal ace, pro, star, hotshot; Brit. informal dab hand; N. Amer. informal maven, crackerjack.
PAST MASTER
Meaning of PAST MASTER in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012