/ Dictionary / Index U unco: Meaning and Definition of Find definitions for: un•co Pronunciation: (ung'kō), [key] — adj., adv., n., pl. -cos. —adj. remarkable; extraordinary. unusual; strange. uncanny. —adv. remarkably; extremely. —n. something extraordinary or unusual; a novelty. news. a stranger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unco (Thesaurus) unclubbable uncoded Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language