EXORDIUM Meaning of EXORDIUM in English n. (pl. exordiums or exordia) the beginning or introductory part, esp. of a discourse or treatise. exordial adj. exordially adv.[ L f. exordiri (as EX-(1), ordiri begin) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012