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
Examples of locknut in a Sentence
Recent Examples on the Web
Secure the air intakes at the barrel's base by threading the pipe locknuts onto the close nipples.
—
Joe Kohl-Riggs, Popular Mechanics, 27 July 2023
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Joe Kohl-Riggs, Popular Mechanics, 27 July 2023
Cite this Entry
“Locknut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/locknut. Accessed 17 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share