redan

In field fort., the simplest kind of work employed, consisting of two parapets of earth raised so as to form a salient angle, with the apex toward the enemy and unprotected on the rear.

A downward projection in a wall on uneven ground to render it level.

Synonyms See fortification.

A work having two parapets whose faces unite so as to form a salient angle toward the enemy.

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