Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
acre-foot is a noun meaning "the volume of water that would cover 1 acre to a depth of 1 foot; 43,560 cubic feet or 1233.5 cubic meters". It carries one recorded sense.
the volume of water that would cover 1 acre to a depth of 1 foot; 43,560 cubic feet or 1233.5 cubic meters
Definitions, synonyms and semantic relations for acre-foot come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.