master key
noun
RareNot in standard dictionaries
1
A key designed to open a set of several locks; a passkey.
2
Any tool or technique that can solve many types of difficulty.
3
A shotgun shell designed for breaching doors.
#slang
A key designed to open a set of several locks; a passkey.
Any tool or technique that can solve many types of difficulty.
A shotgun shell designed for breaching doors.