Definition of "Mat" :
noun: a thick flat pad used as a floor covering
noun: sports equipment consisting of a piece of thick padding on the floor for gymnastic sports
noun: a small pad of material that is used to protect surface from an object placed on it
noun: mounting consisting of a border or background for a picture
noun: a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
noun: the property of having little or no contrast; lacking highlights or gloss
noun: a master's degree in teaching
noun: a mass that is densely tangled or interwoven
"A mat of weeds and grass."
verb: change texture so as to become matted and felt-like
verb: twist together or entwine into a confusing mass
adjective: not reflecting light; not glossy
"A photograph with a matte finish."