Definitions for "Breastwork"
A defensive work of moderate height, hastily thrown up, of earth or other material.
See Parapet.
Low defensive wall or earthwork, especially to protect gunners or artillery. These structures were often improvised both by besieging or attacking forces, and by defenders.
Keywords:  timber, sentry, rampart, wharf, fort
Vertically faced or steeply inclined structure built parallel to the shoreline, at or near the crest of the beach, to resist erosion, usually timber.
A timber barrier that separates a vessel from a wharf.
the vertical timber-work built on top of the earth rampart of a fort to provide screening for the sentry
A railing on the quarter-deck and forecastle.
Balustrades along the upper decks topped by a rail.