Simple Definition of past master
: a person who has done something many times before and has become very skilled at doing it
Full Definition of past master
1 : one who has held the office of worshipful master in a lodge of Freemasons or of master in a guild, club, or society
2 [alteration of passed master] : one who is expert : adept
Examples of past master in a sentence
He's a past master at finding ways to get out of trouble.
They are past masters of the art of propaganda.
First Known Use of past master
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