/ Dictionary / Index A arbitrer: Meaning and Definition of Find definitions for: ar•bi•trer Pronunciation: (är'bi-trur), [key] — n. Obs. arbitrator. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arbitrement arbitress Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language