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master key

From Wiktionary, the free dictionary

English

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Pronunciation

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Noun

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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.

Translations

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See also

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Anagrams

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