symposiac /sɪmˈpəʊziæk/noun 2adjective 1forms 3 noun2 •A conference or conversation of philosophers at a banquet. •Any similar gathering. adjective1 •Of or pertaining to a symposium.The ancient custome in Symposiack meetings was to weave chaplets of roses about their heads. — 1687 formssymposiacs · more symposiac · most symposiac