(of a colour, paint, or surface) dull and flat; without a shine

prints are available on matt or glossy paper

a matt black

a matt paint or finish

the varnishes are available in gloss, satin, and matt

a sheet of cardboard placed on the back of a picture, either as a mount or to form a border

try mounting prints against a deep matt or ground of the same background colour

give a matt appearance to (something)

its bright fresh surface was soon matted with dust and insects