Pronunciation: (um'bur),[key] —n. 1. an earth consisting chiefly of a hydrated oxide of iron and some oxide of manganese, used in its natural state as a brown pigment (raw umber) or, after heating, as a reddish-brown pigment (burnt umber). 2. the color of such a pigment; dark dusky brown or dark reddish brown.
3. Ichthyol.the European grayling, Thymallus thymallus. 4. North Eng. Dial.shade; shadow.