sunk fence
NounWordNet 3.0
Noun (1)
- a ditch with one side being a retaining wall; used to divide lands without defacing the landscapeSynonyms: sunk fenceha-hahaw-haw
Webster's Dictionary (GCIDE)
Sunk fence, a ditch with a retaining wall, used to divide lands without defacing a landscape; a ha-ha. [1913 Webster]