The Collaborative International Dictionary of English v.0.48:

detente \detente\ (d[asl]*t[aum]nt"), n.
   the easing of tensions or strained relations (especially
   between nations), as by agreement, negotiation, or tacit
   understandings.
   [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

detente
    n 1: the easing of tensions or strained relations (especially
         between nations)

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "detente":
   Eisenhower Doctrine, Monroe Doctrine, Nixon Doctrine,
   Truman Doctrine, United Nations troops, appeasement,
   balance of power, brinkmanship, calming, coexistence, colonialism,
   compromise, conciliation, containment, deterrence, diplomacy,
   diplomatic, diplomatics, dollar diplomacy, dollar imperialism,
   dulcification, easing of relations, expansionism, foreign affairs,
   foreign policy, good-neighbor policy, imperialism,
   internationalism, isolationism, manifest destiny, mediation,
   militarism, mollification, nationalism, neocolonialism, neutralism,
   nonresistance, open door, open-door policy, pacification,
   peace offensive, peace-keeping force, peaceful coexistence,
   peacemaking, peacemongering, placability, placation, preparedness,
   propitiation, relaxation of tension, shirt-sleeve diplomacy,
   shuttle diplomacy, soothing, spheres of influence, the big stick,
   tough policy, tranquilization, world politics