English dictionary

linchpin

/'l/I/n/tS/,p/I/n/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

a central cohesive source of support and stability

noun.cognition

Examples
He is the linchpin of this firm.

Synonyms anchor backbone keystone lynchpin mainstay

Source: WordNet 3.0
pin inserted through an axletree to hold a wheel on

noun.artifact

Synonyms lynchpin

Source: WordNet 3.0
A pin used to prevent the wheel of a vehicle from sliding off the axletree.

noun

Source: webster1913