/ Dictionary / Index A accelerando: Meaning and Definition of Find definitions for: ac•cel•er•an•do Pronunciation: (ak-sel"u-ran'dō, -rän'-It.ät-che"le-rän'dô), [key] — adv., adj. Music. gradually increasing in speed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: accelerando (Thesaurus) accel. accelerant 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