/ Dictionary / Index U uncial: Meaning and Definition of Find definitions for: un•ci•al Pronunciation: (un'shē-ul, -shul), [key] — adj. designating, written in, or pertaining to a form of majuscule writing having a curved or rounded shape and used chiefly in Greek and Latin manuscripts from about the 3rd to the 9th centurya.d. —n. an uncial letter. uncial writing. a manuscript written in uncials. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: uncial (Thesaurus) uncia unciform Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language