notch
noun
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a small cutsnick
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a V-shaped or U-shaped indentation carved or scratched into a surface“There were four notches in the handle of the revolver.”
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the location in a range of mountains of a geological formation that is lower than the surrounding peakspass
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a V-shaped indentation“mandibular notch”
verb
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notch a surface to record something
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cut or make a notch into“notch the rope”