Definition of "checkmates" []

• Plural form of checkmate. (noun)
• Third-person singular simple present indicative form of checkmate. (verb)

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• "That's why if Obama says, I'd send Bill Clinton too, it's a no-brainer, it completely checkmates the whole argument."
• "How many checkmates can there be in a single game?"
• "It is much like trying to make an offensive move on a giant chess board only to discover ourselves in the crossfire of multiple checkmates."