/ Dictionary / Index O Outer Mongolia: Meaning and Definition of Find definitions for: Out'er Mongo'lia Pronunciation: [key] former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Outer Hebrides outermost Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language