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Noun: acre-foot (acre-feet)  'ey-ku(r),fût
  1. The volume of water that would cover 1 acre to a depth of 1 foot; 43,560 cubic feet or 1233.5 cubic meters
    "The reservoir's capacity was measured in acre-feet"

Derived forms: acre-feet

Type of: capacity measure, capacity unit, cubage unit, cubature unit, cubic content unit, cubic measure, displacement unit, volume unit

Encyclopedia: Acre-foot