key (plural keys)

  1. An object designed to open and close a lock.
  2. An object designed to fit between two other objects (such as a shaft and a wheel) in a mechanism and maintain the orientation between them.
  3. A crucial step or requirement.
    the key to solving this problem...
    the key to winning this game
  4. One of several small, usually square buttons on a typewriter or computer keyboard, most of which generally correspond to a particular letter of the alphabet, numeral, or special symbol.
    Press the Escape key.
  5. One of a number of rectangular moving parts on a piano or musical keyboard, each causing a particular sound or note to be produced.
  6. A hierarchical scale of musical notes on which a composition is based
    The key of B-flat major
  7. A device used to transmit Morse code.
  8. (cryptography) A piece of information (e.g. a passphrase) used to encode or decode a message or messages.
  9. (computing): In a database, a field of a relation constrained to be unique.
  10. (computing): In a database, a field in a record that is used as a search argument (but is not necessarily unique).
  11. (computing): A value that uniquely identifies an entry in an associative array.
  12. (basketball): The free-throw lane together with the circle surrounding the freethrow line, the freethrow lane having formerly been narrower, giving the area the shape of a skeleton key hole.
    He shoots from the top of the key.
  13. (also cay) One of a string of small islands.
    "the Florida Keys"
  14. A small guide explaining the symbols or terminology of a document.
    The key says that A stands for the accounting department.

3 letters in word "key": E K Y.

Anagrams of key:

Words found within key:

ky ye

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