Re*dan" (r?*d?n"), n. [F., for OF. redent a double notching or jagging, as in the teeth of a saw, fr. L. pref. re- re- + dens, dentis, a tooth. Cf. Redented.] [Written sometimes redent and redens.] 1. (Fort.) A work having two parapets whose faces unite so as to form a salient angle toward the enemy.

2. A step or vertical offset in a wall on uneven ground, to keep the parts level.