Linchpin

noun

/ˈlɪnt͡ʃˌpɪn/

Word Frequency: 0.2

Definitions

1.nounA pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.

2.nounA central cohesive source of stability and security; a person or thing that is critical to a system or organisation.

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