retaining wall
structure designed to confine and support soil laterally so that it can be retained on unnatural slopes
en-GB/ɹɪˈteɪnɪŋ ˈwɔːl/
en-US/ɹɪˈteɪnɪŋ wɑl/
structure designed to confine and support soil laterally so that it can be retained on unnatural slopes