/ Dictionary / Index U unleaded: Meaning and Definition of Find definitions for: un•lead•ed Pronunciation: (un-led'id), [key] — adj. (of gasoline) containing no tetraethyllead; lead-free. not separated or spaced with leads, as lines of type or printed matter. —n. an unleaded product, esp. gasoline that contains no tetraethyllead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unleaded (Thesaurus) unlay unlearn Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language