A brown or reddish pigment used in both oil and water colors, obtained from certain natural clays variously colored by the oxides of iron and manganese. It is commonly heated or burned before being used, and is then called burnt umber; when not heated, it is called raw umber. See Burnt umber, below.
- A natural brown earth containing ferric oxide and manganese oxides, used as pigment.
- Any of the shades of brown produced by umber in its various states.
- Of or related to umber.
- Having a brownish color.
- To darken with or as if with umber.