/ Dictionary / Index U unflappable: Meaning and Definition of Find definitions for: un•flap•pa•ble Pronunciation: (un-flap'u-bul), [key] — adj. not easily upset or confused, esp. in a crisis; imperturbable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unflappable (Thesaurus) unfix unfledged Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language