/ Dictionary / Index F flat tire: Meaning and Definition of Find definitions for: flat' tire' Pronunciation: [key] a pneumatic tire that has lost all or most of its air through leakage, puncture, or the like. a dull or socially inept person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. flattery flattish Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language