Definitions of gauge:

• noun:   a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
• noun:   the thickness of wire
• noun:   the distance between the rails of a railway or between the wheels of a train
• noun:   accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared
• noun:   diameter of a tube or gun barrel
• verb:   mix in specific proportions

  Example: "Gauge plaster"

• verb:   adapt to a specified measurement

  Example: "Gauge the instruments"

• verb:   measure precisely and against a standard

  Example: "The wire is gauged"

• verb:   determine the capacity, volume, or contents of by measurement and calculation

  Example: "Gauge the wine barrels"

• verb:   rub to a uniform size

  Example: "Gauge bricks"

• verb:   judge tentatively or form an estimate of (quantities or time)