rain gauge

noun

1. a device used to measure the amount of rain that falls over a period of time

   B2

   countable

   • "There is a rain gauge in our garden."A2
   • "After the storm, we checked the rain gauge to see how much rain had fallen."B1
   • "The rain gauge recorded 25 millimetres of rain overnight."B1
   • "Scientists compared the rain gauge readings with satellite data to validate the rainfall estimates."C1