a discussion or conversation in which three persons or groups participate.
Origin of trialogue
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trialogue
Historical Examples of trialogue
These three characters carried on a conversation (trialogue) in which great truths were boldly professed.History of the Reformation in the Sixteenth Century, Volume V
J. H. Merle d'Aubigné