/ Dictionary / Index U unicorn: Meaning and Definition of Find definitions for: u•ni•corn Pronunciation: (y'ni-kôrn"), [key] — n. a mythical creature resembling a horse, with a single horn in the center of its forehead: often symbolic of chastity or purity. a heraldic representation of this animal, in the form of a horse with a lion's tail and with a long, straight, and spirally twisted horn. (cap.)the constellation Monoceros. an animal mentioned in the Bible, Deut. 33:17: now believed by some to be a description of a wild ox or rhinoceros. a former gold coin of Scotland, first issued by James III in 1486, having an obverse bearing the figure of a unicorn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unicorn (Thesaurus) unicolor unicorn plant Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language