/ ˌeɪ ˌpɒsteriˈɔːraɪ; NAmE ˌpɑːs-/ adjective , adverb
(from Latin , formal ) analysing sth by starting from known facts and then thinking about the possible causes of the facts, for example saying 'Look, the streets are wet so it must have been raining.'
—compare a priori
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WORD ORIGIN
early 17th cent.: Latin , from what comes after .