locknut

noun
lock·​nut | \ ˈläk-ˌnət How to pronounce locknut (audio) \

Definition of locknut

1 : a nut screwed down hard on another to prevent it from slacking back
2 : a nut so constructed that it locks itself when screwed tight against another part

First Known Use of locknut

1855, in the meaning defined at sense 1

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The first known use of locknut was in 1855

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Cite this Entry

“Locknut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/locknut. Accessed 6 Aug. 2020.

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