/ Dictionary / Index U unbuttoned: Meaning and Definition of Find definitions for: un•but•toned Pronunciation: (un-but'nd), [key] — adj. not buttoned. free, open, or informal; unrestrained: unbuttoned humor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unbuttoned (Thesaurus) unbutton UNC Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language