A variant spelling (archaic) of benchmark, a standard of measurement or point of reference for comparison.
Derives from 'bench' (a surveyor's reference mark cut into stone) and 'mark' (a visible sign). This spelling is rarely used in modern English, superseded by 'benchmark.'
Medieval surveyors literally chiseled marks into church walls and bridges to create permanent reference points—that's why we still call any standard of comparison a 'benchmark' today!
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