Pronunciation: (u-pôr'ē-u, u-pōr'-),[key] —n., —pl.a•po•ri•as, a•po•ri•aePronunciation: (u-pôr'ē-ē", u-pōr'-).[key] 1. Rhet.the expression of a simulated or real doubt, as about where to begin or what to do or say.
2. Logic,Philos.a difficulty encountered in establishing the theoretical truth of a proposition, created by the presence of evidence both for and against it.