matt(n = noun.attribute) flatness, lusterlessness, lustrelessness, mat, matte - the property of having little or no contrast; lacking highlights or gloss;
is a kind of dullness
Derived form adjective matt₁

   matt(s = adj.all) flat, mat, matte, matted - not reflecting light; not glossy; "flat wall paint"; "a photograph with a matte finish"
Derived form noun matt₁

   See Matte. Knight. [1913 Webster]

matt, adj., n., & v. (also mat)
--adj. (of a colour, surface, etc.) dull, without lustre.
--n.
1 a border of dull gold round a framed picture.
2 (in full matt paint) paint formulated to give a dull flat finish (cf. GLOSS(1)).
3 the appearance of unburnished gold.
--v.tr. (matted, matting)
1 make (gilding etc.) dull.
2 frost (glass).

Etymology:
F mat, mater, identical with mat MATE(2)