Definition
The critical pin holding everything together—literally in machinery, metaphorically in organizations. Remove this and the whole operation goes wheels-up. It's the person or system so essential that management secretly panics whenever they take a day off.
Example Usage
Sarah is the lynchpin of our entire marketing department; when she went on vacation, three campaigns imploded simultaneously.
Source: Merriam-Webster via Free Dictionary API
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See “lynchpin” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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