/ Dictionary / Index T thunderbird: Meaning and Definition of Find definitions for: thun•der•bird Pronunciation: (thun'dur-bûrd"), [key] — n. (in the mythology of some North American Indians) a huge, eaglelike bird capable of producing thunder, lightning, and rain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thunderbird (Thesaurus) Thunder Bay thunderbolt Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language