/ Dictionary / Index W Wilhelm I: Meaning and Definition of Find definitions for: Wilhelm I. Pronunciation: [key] See(def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Wilhelm Wilhelm II Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language