What is the meaning of 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
• Accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared.
  • synonyms: standard of measurement
• The distance between the rails of a railway or between the wheels of a train.
• The thickness of wire.
• Diameter of a tube or gun barrel.
  • synonyms: bore, caliber, calibre

verb

• Judge tentatively or form an estimate of (quantities or time. )
  • usage: "I estimate this chicken to weigh three pounds"
  • synonyms: estimate, approximate, guess, judge
• Rub to a uniform size.
  • usage: "gauge bricks"
• Determine the capacity, volume, or contents of by measurement and calculation.
  • usage: "gauge the wine barrels"
• Measure precisely and against a standard.
  • usage: "the wire is gauged"
• Adapt to a specified measurement.
  • usage: "gauge the instruments"
• Mix in specific proportions.
  • usage: "gauge plaster"