Symposiac \Sym*po"si*ac\, a. [L. symposiacus, Gr. ?.] Of or pertaining to compotations and merrymaking; happening where company is drinking together; as, symposiac meetings. Symposiac disputations amongst my acquaintance. --Arbuthnot. Symposiac \Sym*po"si*ac\, n. A conference or conversation of philosophers at a banquet; hence, any similar gathering.