/ Dictionary / Index U unceremonious: Meaning and Definition of Find definitions for: un•cer•e•mo•ni•ous Pronunciation: (un"ser-u-mō'nē-us), [key] — adj. discourteously abrupt; hasty; rude: He made an unceremonious departure in the middle of my speech. without ceremony or formalities; informal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unceremonious (Thesaurus) unceasing uncertain Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language