Be key meaning in English

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Definition

(the next game will be) key: (the next match will be) essential, fundamental, central, crucial adjective
a key: a metal device used to open locks noun
  • "As secretary of the local Ladies' Knitting Collective, I am key in determining the establishments which the ladies of this city frequent."
  • "The collapse of the dollar is key."
  • "The speed of the collapse of the dollar is key."

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