definition of
gauge

[1] #1 gauge v. [estimate, approximate, guess, judge] judge tentatively or form an estimate of (quantities or time); "I estimate this chicken to weigh three pounds". wn

[2] #2 gauge n. [gage] a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.. wn

[3] #3 gauge v. rub to a uniform size; "gauge bricks". wn

[4] #4 gauge n. [standard of measurement] accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared. wn

[5] #5 gauge n. the distance between the rails of a railway or between the wheels of a train. wn