/ Dictionary / Index T Tao: Meaning and Definition of Find definitions for: Tao Pronunciation: (dou, tou), [key] (in philosophical Taoism) that in virtue of which all things happen or exist. the rational basis of human activity or conduct. a universal, regarded as an ideal attained to a greater or lesser degree by those embodying it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tao (Thesaurus) tanzanite Taoism Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language