Source : Webster's Revised Unabridged Dictionary (1913)

Timber \Tim"ber\, v. t. [imp. & p. p. {Timbered}; p. pr. & vb.
   n. {Timbering}.]
   To furnish with timber; -- chiefly used in the past
   participle.

         His bark is stoutly timbered.            --Shak.

Timbered \Tim"bered\, a.
   1. Furnished with timber; -- often compounded; as, a
      well-timbered house; a low-timbered house. --L'Estrange.

   2. Built; formed; contrived. [R.] --Sir H. Wotton.

   3. Massive, like timber. [Obs.]

            His timbered bones all broken, rudely rumbled.
                                                  --Spenser.

   4. Covered with growth timber; wooden; as, well-timbered
      land.

Source : WordNet®

timbered
     adj 1: furnished with or made of wood or timbers; "timbered walls"
            [ant: {untimbered}]
     2: covered with growing timber; "thickly timbered ridges
        clothed with loblolly pine and holly"; "hills timbered up
        to their summits"