Source : Webster's Revised Unabridged Dictionary (1913)

Aporia \A*po"ri*a\, n.; pl. {Aporias}. [L., doubt, Gr. ?, fr. ?
   without passage, at a loss; 'a priv. + ? passage.] (Rhet.)
   A figure in which the speaker professes to be at a loss what
   course to pursue, where to begin to end, what to say, etc.