1. Lost, hidden, or out of sight; concealed or secluded.
Usage: Chiefly literary or archaic; Often used in the phrase 'in perdu' meaning in hiding or concealment

1. A soldier or scout sent on a dangerous mission with little chance of survival; a forlorn hope.
Usage: Military term; Archaic or historical

Examples

• The cottage lay in perdu among the dense forest.
• He remained in perdu for weeks, avoiding detection.
• The general sent a small band of perdus to scout the enemy position.
• Her talent had long remained perdu, unknown to the world.
• The lost manuscript was discovered in a perdu corner of the library.