Meaning Of The Word Master key

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Master key Meaning

Master key Definition
Master key Definition

What's The Definition Of Master key?

master key
countable noun: A master key is a key which will open all the locks in a set, even though each lock has its own different key.

master key in American English
a key that will open a number of different locks, the proper keys of which are not interchangeable
a key that will open every one of a set of locks

master key in British English
noun: a key that opens all the locks of a set, the individual keys of which are not interchangeable

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