gauge

/ɡeɪdʒ/
noun
  1. An instrument or device used for measuring something, such as pressure, thickness, or distance.
    • A rain gauge in the backyard showed we got two inches of water last night.
    • The fuel gauge in my car is broken, so I never know how much gas I have left.
    • The mechanic checked the tire pressure with a gauge.
  2. A measurement or standard used to judge or compare something.
    • Customer satisfaction is a good gauge of how well a business is doing.
    • Her test scores are not an accurate gauge of her true ability.
    • The number of people at the protest was a gauge of public anger over the new law.
  3. The thickness, diameter, or size of something, especially wire, sheet metal, or a firearm barrel.
    • You need a thicker gauge of wire for this electrical project.
    • The shotgun is a 12-gauge, which is a common size for hunting.
    • The artist used a very fine gauge of needle for the embroidery.
  4. The distance between the rails of a railroad track.
    • Most countries use standard gauge for their railway tracks.
    • The narrow-gauge railway winds through the mountains.
    • Engineers checked the gauge to make sure the tracks were properly aligned.
verb
  1. To measure or determine the amount, level, or size of something using an instrument or by estimation.
    • The technician gauged the pressure in the boiler to ensure it was safe.
    • We tried to gauge the depth of the river before crossing.
    • He used a ruler to gauge the length of the board.
  2. To estimate or judge a situation, feeling, or quality.
    • It's hard to gauge how people will react to the new policy.
    • She looked at his face to gauge his mood before speaking.
    • The teacher tried to gauge the class's understanding of the topic.