/ Dictionary / Index O oncoming: Meaning and Definition of Find definitions for: on•com•ing Pronunciation: (on'kum"ing, ôn'-), [key] — adj. approaching; nearing: the oncoming train; the oncoming holiday season. emerging: the oncoming generation of leaders. —n. approach; onset: the oncoming of winter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oncoming (Thesaurus) oncology oncornavirus Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language