noun
a structure built to support the lateral pressure of an arch or span, e.g., at the ends of a bridge
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The engineer inspected the abutments of the bridge to ensure they were structurally sound.
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I saw some workers fixing the abutments of the old building down the street.
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I don't know why they keep messing with the abutments, it's fine the way it is.
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The abutments of his argument were weak, leading to a flawed conclusion.