/ Dictionary / Index T tundra: Meaning and Definition of Find definitions for: tun•dra Pronunciation: (tun'dru, toon'-), [key] — n. one of the vast, nearly level, treeless plains of the arctic regions of Europe, Asia, and North America. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tundra (Thesaurus) tundish tundra swan Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language