/ Dictionary / Index U Usk: Meaning and Definition of Find definitions for: Usk Pronunciation: (usk), [key] — n. a river flowing S and SE from SE Wales through SW England into the Severn estuary. 60 mi. (97 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. USITC Üsküb Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language