/ Dictionary / Index F fixed idea: Meaning and Definition of Find definitions for: fixed' ide'a Pronunciation: [key] a persistent or obsessing idea, often delusional, that can, in extreme form, be a symptom of psychosis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fixed-focus camera fixed-income Related Content Daily Word Quiz: reiterate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language