/ Dictionary / Index A à propos de rien*: Meaning and Definition of Find definitions for: à pro•pos de rien Pronunciation: (a prô-pō du ryan'), [key] — French. French. apropos of nothing; with reference to nothing in particular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. apropos aprotic Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language