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sure thing

noun

  1. That which is certain.

    "That horse is a sure thing in the race at 3:30."

    Similar: certainty, safe bet

Synonymscertainty, safe bet
interjection

  1. A polite reply to thank you.

    ""Thanks a lot for your help." / "Sure thing!""

  2. An affirmative reply; yes; certainly.

    ""Can you finish by tomorrow?" / "Sure thing!""

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