Source : Webster's Revised Unabridged Dictionary (1913)

Mat \Mat\, v. t. [imp. & p. p. {Matted}; p. pr. & vb. n.
   {Matting}.]
   1. To cover or lay with mats. --Evelyn.

   2. To twist, twine, or felt together; to interweave into, or
      like, a mat; to entangle.

            And o'er his eyebrows hung his matted hair.
                                                  --Dryden.

Matting \Mat"ting\, n. [From {Mat}, v. t. & i.]
   1. The act of interweaving or tangling together so as to make
      a mat; the process of becoming matted.

   2. Mats, in general, or collectively; mat work; a matlike
      fabric, for use in covering floors, packing articles, and
      the like; a kind of carpeting made of straw, etc.

   3. Materials for mats.

   4. An ornamental border. See 3d {Mat}, 4.

Matting \Mat"ting\, n. [See {Matte}.]
   A dull, lusterless surface in certain of the arts, as
   gilding, metal work, glassmaking, etc.

Source : WordNet®

mat
     adj : not reflecting light; not glossy; "flat wall paint"; "a
           photograph with a matte finish" [syn: {flat}, {matt}, {matte},
            {matted}]
     [also: {matting}, {matted}]

mat
     n 1: a thick flat pad used as a floor covering
     2: mounting consisting of a border or background for a picture
        [syn: {matting}]
     3: sports equipment consisting of a piece of thick padding on
        the floor for gymnastic sports [syn: {gym mat}]
     4: a master's degree in teaching [syn: {Master of Arts in
        Teaching}]
     5: the property of having little or no contrast; lacking
        highlights or gloss [syn: {flatness}, {lusterlessness}, {lustrelessness},
         {matt}, {matte}]
     6: a small pad of material that is used to protect surface from
        an object placed on it
     [also: {matting}, {matted}]

matting
     n 1: floor covering of coarse fabric (usually of straw or hemp)
     2: mounting consisting of a border or background for a picture
        [syn: {mat}]

mat
     v 1: twist together or entwine into a confusing mass; "The child
          entangled the cord" [syn: {entangle}, {tangle}, {snarl}]
          [ant: {disentangle}, {disentangle}]
     2: change texture so as to become matted and felt-like; "The
        fabric felted up after several washes" [syn: {felt}, {felt
        up}, {mat up}, {matt-up}, {matte up}, {matte}]
     [also: {matting}, {matted}]

matting
     See {mat}