/ Dictionary / Index T true believer: Meaning and Definition of Find definitions for: true' believ'er Pronunciation: [key] a person who has been thoroughly convinced of something. a fanatic, esp. a religious or political one. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. true bacteria true bill Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language