/ Dictionary / Index Y Yser: Meaning and Definition of Find definitions for: Y•ser Pronunciation: (Fr. ē-zer'), [key] — n. a river flowing from N France through NW Belgium into the North Sea: battles 1914–18. 55 mi. (89 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ysbaddaden Chief-giant Yseult Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language