from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A conversation or discussion in which three people or groups participate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A discourse or colloquy by three people.
from the GNU version of the Collaborative International Dictionary of English
- n. A discourse or colloquy by three persons.
from The Century Dictionary and Cyclopedia
- n. Discourse by three speakers; a colloquy of three persons.
tri- + (di)alogue.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin trialogus; tri- + -logus, as in Latin dialogus, English dialogue. (Wiktionary)