The Collaborative International Dictionary of English v.0.48:

Truce \Truce\, n. [OE. trewes, triwes, treowes, pl. of trewe a
   truce, properly, pledge of fidelity, truth, AS. tre['o]w
   fidelity, faith, troth. See True.]
   1. (Mil.) A suspension of arms by agreement of the commanders
      of opposing forces; a temporary cessation of hostilities,
      for negotiation or other purpose; an armistice.
      [1913 Webster]

   2. Hence, intermission of action, pain, or contest; temporary
      cessation; short quiet.
      [1913 Webster]

            Where he may likeliest find
            Truce to his restless thoughts.       --Milton.
      [1913 Webster]

   Flag of truce (Mil.), a white flag carried or exhibited by
      one of the hostile parties, during the flying of which
      hostilities are suspended.

   Truce of God, a suspension of arms promulgated by the
      church, which occasionally took place in the Middle Ages,
      putting a stop to private hostilities at or within certain
      periods.
      [1913 Webster]

WordNet (r) 3.0 (2006):

truce
    n 1: a state of peace agreed to between opponents so they can
         discuss peace terms [syn: armistice, cease-fire,
         truce]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "truce":
   Pax Dei, Pax Romana, Peace of God, abeyance, accord, agreement,
   armistice, break, breather, breathing spell, buffer zone, caesura,
   cease-fire, compact, cooling-off period, day off, de-escalation,
   demilitarized zone, drop, hesitation, holiday, hollow truce,
   interim, interlude, intermezzo, intermission, intermittence,
   interruption, interval, lapse, layoff, letup, lull, modus vivendi,
   moratorium, neutral territory, pacification, pact, pause,
   pax in bello, peace, recess, reconciliation, remission, respite,
   rest, stand-down, stay, suspension, suspension of hostilities,
   temporary arrangement, treaty, treaty of peace, vacation,
   wind down



Bouvier's Law Dictionary, Revised 6th Ed (1856):

TRUCE, intern. law. An agreement between belligerent parties, by which they
mutually engage to forbear all acts of hostility against each other for some
time, the war still continuing. Burlamaqui's N. & P. Law, part 4, c. 11,
Sec. 1.
     2. Truces are of several kinds: general, extending to all the
territories and dominions of both parties; and particular, restrained to
particular places; as, for example, by sea, and not by land, &c. Id. part 4,
c. 11, Sec. 5. They are also absolute, indeterminate and general; or limited
and determined to certain things, for example, to bury the dead. Ib. idem.
Vide 1 Kent, Com. 159; Com. Dig. Admiralty, E 8; Bac. Ab.;Prerogative, D 4;
League; Peace; War.



The Devil's Dictionary (1881-1906):

TRUCE, n.  Friendship.