Skeleton key

noun

Definitions

Noun
  1. 1
    A very simple design of key that usually has a cylindrical shaft (sometimes called a "shank") and a single, minimal flat, rectangular tooth or "bit".
  2. 2
    a passkey with much of the bit filed away so that it can open different locks wordnet
  3. 3
    A key that has parts filed away so that it will open a range of locks.
  4. 4
    A master key.

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