mat in WordNet English dictionary

1. twist together or entwine into a confusing mass
   "The child entangled the cord"
   entangle  tangle  mat  snarl 
   
2. change texture so as to become matted and felt-like
   "The fabric felted up after several washes"
   felt  felt up  mat up  matt-up  matte up  matte  mat 
   

1. not reflecting light; not glossy
   "flat wall paint"; "a photograph with a matte finish"
   flat  mat  matt  matte  matted 
   

1. the property of having little or no contrast; lacking highlights or gloss
   flatness  lusterlessness  lustrelessness  mat  matt  matte 
   
2. sports equipment consisting of a piece of thick padding on the floor for gymnastic sports
   mat  gym mat 
   
3. a thick flat pad used as a floor covering
   mat 
   
4. a small pad of material that is used to protect surface from an object placed on it
   mat 
   
5. mounting consisting of a border or background for a picture
   mat  matting 
   
6. a mass that is densely tangled or interwoven
   "a mat of weeds and grass"
   mat