D defs.my
Entry 1 sense Webster, 1913

Counterscarp

/(koun`tẽr*skärp`)/ · Coun·ter·scarp · IPA
01 n. The exterior slope or wall of the ditch; -- sometimes, the whole covered way, beyond the ditch, with its parapet and glacis; as, the enemy …
  1. 1.
    The exterior slope or wall of the ditch; -- sometimes, the whole covered way, beyond the ditch, with its parapet and glacis; as, the enemy have lodged themselves on the counterscarp.(Fort.)