/ Dictionary / Index F Finno-Russo War: Meaning and Definition of Find definitions for: Fin'no-Rus'so War' Pronunciation: (fin'ō-rus'ō), [key] the war (1939–40) between Finland and the Soviet Union. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Finno- Finno-Ugrian Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language