gauge

(noun) a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.. Synonyms: gage.

(noun) accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared. Synonyms: standard of measurement.

(noun) the distance between the rails of a railway or between the wheels of a train.

(noun) the thickness of wire.

(noun) diameter of a tube or gun barrel. Synonyms: bore, caliber, calibre.

(verb) judge tentatively or form an estimate of (quantities or time). Synonyms: estimate, approximate, guess, judge. Example: "I estimate this chicken to weigh three pounds."

(verb) rub to a uniform size. Example: "Gauge bricks."

(verb) determine the capacity, volume, or contents of by measurement and calculation. Example: "Gauge the wine barrels."

(verb) measure precisely and against a standard. Example: "The wire is gauged."

(verb) adapt to a specified measurement. Example: "Gauge the instruments."

(verb) mix in specific proportions. Example: "Gauge plaster."