Definitions

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

  • n. A usually thin nut screwed down on another nut to prevent it from loosening.
  • n. A self-locking nut.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A second nut, screwed down onto another in order to prevent it slipping

from the GNU version of the Collaborative International Dictionary of English

  • n. See Check nut, under Check.
  • n. a supplementary nut that is screwed down on a primary nut to prevent it from loosening; a check nut.
  • n.

from The Century Dictionary and Cyclopedia

  • n. A supplementary nut screwed down upon another to prevent it from shaking loose; a jam-nut, check-nut, or pinch-nut.

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

  • n. supplementary nut that is screwed down on a primary nut to prevent it from loosening

Etymologies

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