noun
a person or group that is the first to do something and that therefore sets an example for others to follow
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The company is known for being a pacesetter in the industry, always setting the bar high for innovation.
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She's definitely a pacesetter when it comes to fashion trends among her friends.
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That new artist is a total pacesetter, everyone's trying to copy their style.
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As a pacesetter in the field of technology, he is constantly pushing boundaries and inspiring others to follow suit.