acre-foot

[ ey-ker-foo t ]
/ ˈeɪ kərˈfʊt /

noun

a unit of volume of water in irrigation: the amount covering one acre to a depth of one foot, equal to 43,560 cubic feet.

Origin of acre-foot

An Americanism dating back to 1900–05

British Dictionary definitions for acre-foot

acre-foot

noun plural -feet

the volume of water that would cover an area of 1 acre to a depth of 1 foot: equivalent to 43 560 cubic feet or 1233.5 cubic metres