/ Dictionary / Index U umber: Meaning and Definition of Find definitions for: um•ber Pronunciation: (um'bur), [key] — n. an earth consisting chiefly of a hydrated oxide of iron and some oxide of manganese, used in its natural state as a brown pigmentor, after heating, as a reddish-brown pigment the color of such a pigment; dark dusky brown or dark reddish brown. the European grayling, Thymallus thymallus. shade; shadow. —adj. of the color umber. —v.t. to color with or as if with umber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: umber (Thesaurus) umbellule Umberto Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language