/ Dictionary / Index A au*: Meaning and Definition of Find definitions for: au Pronunciation: (ō), [key] — pl. aux to the; at the; with the. Cf. à la. AU Pronunciation: [key] See Au Pronunciation: [key] author. gold. A.U. Pronunciation: [key] angstrom unit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. atypical A.U.A. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language