From WordNet (r) 2.0 (August 2003) [wn]:
matt
adj : not reflecting light; not glossy; "flat wall paint"; "a
photograph with a matte finish" [syn: flat, mat,
matte, matted]
n : the property of having little or no contrast; lacking
highlights or gloss [syn: flatness, lusterlessness,
lustrelessness, mat, matte]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Mat \Mat\ (m[a^]t), n. [Cf. Matte.]
A name given by coppersmiths to an alloy of copper, tin,
iron, etc., usually called white metal. [Written also
matt.]
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Matt \Matt\, n.
See Matte. --Knight.
[1913 Webster]