—n.
1 a natural pigment like ochre but darker and browner.
2 the colour of this.
—adj.
1 of this colour.
2 dark, dusky.
Etymology: F (terre d') ombre or It. (terra di) ombra = shadow (earth), f. L UMBRA or Umbra fem. of Umber Umbrian
Useful english dictionary. 2012.