1. Principal men's room or hall in an Ancient Greek house, or a room in a temple where only the priest could enter.
2. Square or rectangular room often with a raised central hearth, and four columns supporting the roof. The side walls projected beyond the front wall and partly enclosed a columned porch, probably the precedent for a Doric temple.
D. S. Robertson (1945)
"megaron." A Dictionary of Architecture and Landscape Architecture. . Encyclopedia.com. (August 17, 2018). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/megaron
"megaron." A Dictionary of Architecture and Landscape Architecture. . Retrieved August 17, 2018 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/megaron