noun
a projecting part of a fortification built at an angle to the line of a wall, so as to allow defensive fire in several directions
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The old castle stood as a bastion of history and tradition.
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The library has become a bastion for students to study and hang out.
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The bar down the street is a bastion for local musicians to showcase their talent.
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Her strong willpower was a bastion against any challenges that came her way.