/ Dictionary / Index T tanist: Meaning and Definition of Find definitions for: tan•ist Pronunciation: (tan'ist, thô'nist), [key] — n. Hist. the successor apparent to a Celtic chief, usually the oldest or worthiest of his kin, chosen by election among the tribe during the chief 's lifetime. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tanis tanistry Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language