/ Dictionary / Index U usageaster: Meaning and Definition of Find definitions for: u•sage•as•ter Pronunciation: (y'sij-as"tur), [key] — n. a self-styled authority on language usage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. usage usance Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language