Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A key that opens every one of a given set of locks. Also called passkey.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A key designed to open a set of several locks; a passkey

from the GNU version of the Collaborative International Dictionary of English

  • n. a key adapted to open several locks differing somewhat from each other; figuratively, a rule or principle of general application in solving difficulties.

from The Century Dictionary and Cyclopedia

  • n. A key which opens (masters) many locks so differently constructed that the key proper to each will open none of the others.
  • n. Figuratively, a general clue to lead out of many difficulties; a guide to the solution of many questions or doubts.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. key that secures entrance everywhere

Etymologies

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Examples

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