WordReference Random House Unabridged Dictionary of American English © 2025
trou-de-loup
(tro̅o̅d′l o̅o̅′),USA pronunciation n., pl. trous-de-loup (tro̅o̅d′l o̅o̅′).USA pronunciation [Mil.]
- Militarya conical or pyramidal pit with a pointed stake fixed vertically in the center, rows of which are dug in front of a fortification to hinder an enemy's approach, formerly used chiefly against cavalry.
- French: literally, wolf hole
- 1780–90