/ Dictionary / Index A aback: Meaning and Definition of Find definitions for: a•back Pronunciation: (u-bak'), [key] — adv. toward the back. so that the wind presses against the forward side of the sail or sails. surprised and disconcerted: I was taken aback by his harsh criticism. —adj. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aback (Thesaurus) abacist Abaco Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language