noun
a master of ceremonies, especially a person who introduces performers or speakers at a public event
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The emcee of the event welcomed all the guests and introduced the keynote speaker.
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The emcee did a great job hyping up the crowd before the concert started.
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The emcee at the club was lit, he kept the party going all night.
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As the emcee of the family, she always brought everyone together for holidays and celebrations.