rideaux

Noun

rideau (plural rideaus or rideaux)

1. A fortification or barrier such as a small earthen mound or ridge, a file of troops, etc.
   • A judgment may be formed of the weakness of the place, either by the facility found in making the approaches, or by establishing the magazines in the rear of the trenches, taking advantage of some rideau, or hollow way, whereby the right and left of the trenches are better supported. In order to...1759, Guillaume Le Blond, Jacques Prempart, The Military Engineer

See all 3 meanings of rideau