/ Dictionary / Index U upriver: Meaning and Definition of Find definitions for: up•riv•er Pronunciation: (up'riv'ur), [key] — adv., adj. in the direction of or nearer the source of a river: It's hard to paddle a canoe upriver; an upriver settlement of tribes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: upriver (Thesaurus) uprising uproar Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language