/ Dictionary / Index C crackpot: Meaning and Definition of Find definitions for: crack•pot Pronunciation: (krak'pot"), [key] — Informal. Informal. —n. a person who is eccentric, unrealistic, or fanatical. —adj. eccentric; impractical; fanatical: crackpot ideas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: crackpot (Thesaurus) crack of doom cracksman Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language