a posterioriPronunciation: /eɪ, ɑː, pɒˌstɛrɪˈɔːrʌɪ, pɒˌstɪə-/Definition of a posteriori adjective relating to or denoting reasoning or knowledge which proceeds from observations or experiences to the deduction of probable causes. (in general use) of the nature of an afterthought or subsequent rationalization. adverb in a way based on reasoning from known facts or past events rather than by making assumptions or predictions. [sentence adverb] with hindsight; as an afterthought. Origin: early 17th century: Latin, 'from what comes after'a posteriori in other Oxford dictionaries Definition of a posteriori in the US English dictionary
