lynchpin Meaning, Definition & Usage

  1. noun a central cohesive source of support and stability
    mainstay; backbone; linchpin; keystone; anchor.
    • faith is his anchor
    • the keystone of campaign reform was the ban on soft money
    • he is the linchpin of this firm
  2. noun pin inserted through an axletree to hold a wheel on
    linchpin.

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