noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A nut with an inner ring made of a material with elastic properties to prevent it from slipping.
2. 2
   supplementary nut that is screwed down on a primary nut to prevent it from loosening wordnet
3. 3
   A second nut, screwed down onto another in order to prevent it slipping.

Synonyms

All synonyms

safety nut

Etymology

From lock + nut.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.