noun
A person or group that is the first to do something and so shows that it can be done
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The pathfinder led the expedition through the dense jungle, carefully navigating the unfamiliar terrain.
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The pathfinder dude showed us the best way to get to the concert venue without hitting any traffic.
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Yo, that pathfinder chick knows all the shortcuts around town, she's like a walking GPS.
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As a pathfinder in the field of technology, she is always at the forefront of innovation and new developments.