A short interruption in a war or argument, or an agreement to stop fighting or arguing for a period of time. (Cambridge Dictionary)
A suspension of fighting especially of considerable duration by agreement of opposing forces: Armistice, Cease Fire. (Merriam – Webster)
A respite especially from a disagreeable or painful state or action. (Merriam – Webster)
A truce is an agreement between two people or groups of people to stop fighting or quarrelling for a short time. (Collins Dictionary)
An agreement between enemies or opponents to stop fighting or arguing for a certain time. (Oxford Dictionaries)
The Real Meaning of the 1914 Christmas Truce.
Christmas in the Trenches: The Christmas Truce of 1914 and the True Meaning of Christmas.