/ Dictionary / Index F false horizon: Meaning and Definition of Find definitions for: false' hori'zon Pronunciation: [key] a line or plane that simulates the horizon, used in altitude-measuring devices or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. falsehood false imprisonment Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language