D defs.my
Entry 2 senses Webster, 1913

Water gauge

/wôt'-ẽr gāj/ · Wa·ter gauge · IPA
01 A wall or bank to hold water back.
  1. 1.
    A wall or bank to hold water back.
  2. 2.
    An instrument for measuring or ascertaining the depth or quantity of water, or for indicating the height of its surface, as in the boiler of a steam engine. See Gauge. See: Gauge