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[kee-lis] /ˈki lɪs/
lacking a key or keys.
requiring no key or keys:
a keyless lock operated by a series of push buttons.
Origin of keyless
1815-25; key1 + -less Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for keyless
Historical Examples
  • C repeats the bell code, and pins indicator at "Line clear," shown on B's keyless disc also.

    How it Works Archibald Williams
  • Unless his keyless indicator is at normal, he may not ask, "Is line clear?"

    How it Works Archibald Williams
  • The abandonment of the key nullified the usefulness of the fusee, although some keyless fusee movements were attempted.

    Time Telling through the Ages Harry Chase Brearley
  • A story which in the beginning is very like "The keyless Chest."

  • What were then the alternatives before the, premeditatedly (respectively) and inadvertently, keyless couple?

    Ulysses James Joyce
  • There were two doors, the one I had entered by and another which was locked and keyless.

    Ghosts I Have Seen Violet Tweedale
  • He invented the "crank roller" escapement, a kind of keyless winding for watches, and many other watch parts.

    Time Telling through the Ages Harry Chase Brearley
  • Besides which, the keyless mechanism being attached to the watch, the key can never be lost or mislaid, or worn out.

    Time and Time-Tellers James W. Benson
  • Suppose there was a time when the piano was keyless, as a baby is toothless.

    Elementary Theosophy L. W. Rogers
  • When the red key is depressed, "Train on line" appears at the opening; also in that of a keyless disc at the adjacent signal-box.

    How it Works Archibald Williams

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