Breadcrumb Home > Dictionary Cite Meaning of non causa pro causa Find definitions for: non cau•sa pro cau•sa Pronunciation: (non kô'zu prō kô'zu Lat. nōn kou'sä prō kou'sä), [key] — Logic. Logic. the fallacy of giving as a reason for a conclusion a proposition not actually relevant to that conclusion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Related Content Daily Word Quiz: polemic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language