bulkhead

n. [ See Bulk part of a building. ] 1. (Naut.) A partition in a vessel, to separate apartments on the same deck. [ 1913 Webster ]

2. A structure of wood or stone, to resist the pressure of earth or water; a partition wall or structure, as in a mine; the limiting wall along a water front. [ 1913 Webster ]

Bulked line, a line beyond which a wharf must not project; -- usually, the harbor line. [ 1913 Webster ]