noun linch·pin \ˈlinch-ˌpin\

: a person or thing that holds something together : the most important part of a complex situation or system

Full Definition of LINCHPIN

:  a locking pin inserted crosswise (as through the end of an axle or shaft)
:  one that serves to hold together parts or elements that exist or function as a unit <the linchpin in the defense's case>

Variants of LINCHPIN

linch·pin also lynch·pin \ˈlinch-ˌpin\

Examples of LINCHPIN

  1. This witness is the linchpin of the defense's case.

Origin of LINCHPIN

Middle English lynspin, from lyns linchpin (from Old English lynis) + pin; akin to Middle High German luns linchpin
First Known Use: 13th century

Other Mechanical Engineering Terms

centrifuge, differential, flange, lathe, pinion, plenum, ratchet, traction


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