/ Dictionary / Index F familiar spirit: Meaning and Definition of Find definitions for: famil'iar spir'it Pronunciation: [key] a supernatural spirit or demon supposed to attend on or serve a person. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. familiarize familism Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language