/ Dictionary / Index A accel.: Meaning and Definition of Find definitions for: accel. Pronunciation: [key] accelerando. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. accede accelerando Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language