master key

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Archived revision by Jeluang Terluang (talk | contribs) as of 20:11, 11 December 2019.
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English

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Pronunciation

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Noun

master key (plural master keys)

  1. A key designed to open a set of several locks; a passkey.
  2. (figurative) Any tool or technique that can solve many types of difficulty.
  3. (law enforcement, slang) A shotgun shell designed for breaching doors.

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