S: (n) gauge, standard of measurement (accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared)
S: (n) gauge (the distance between the rails of a railway or between the wheels of a train)
(2)S: (v) estimate, gauge, approximate, guess, judge (judge tentatively or form an estimate of (quantities or time)) "I estimate this chicken to weigh three pounds"
S: (v) gauge (rub to a uniform size) "gauge bricks"