Peace  n. 1 a quiet; tranquillity. B mental calm; serenity. 2 a (often attrib.) Freedom from or the cessation of war (peace talks). B (esp. Peace) treaty of peace between states etc. At war. 3 freedom from civil disorder.  at peace 1 in a state of friendliness. 2 serene. 3 euphem. Dead. Hold one's peace keep silent. Keep the peace prevent, or refrain from, strife. Make one's peace (often foll. By with) re-establish friendly relations. Make peace agree to end a war or quarrel. [latin pax pac-]