/ Dictionary / Index V Velsen: Meaning and Definition of Find definitions for: Vel•sen Pronunciation: (vel'sun), [key] — n. a seaport in W Netherlands. 60,470. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Velox veltheimia Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language