/ Dictionary / Index O ongoing: Meaning and Definition of Find definitions for: on•go•ing Pronunciation: (on'gō"ing, ôn'-), [key] — adj. continuing without termination or interruption: ongoing research projects. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ongoing (Thesaurus) on-glide ONI Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language