The Collaborative International Dictionary of English v.0.48:

Furrow \Fur"row\, v. t. [imp. & p. p. Furrowed; p. pr. & vb.
   n. Furrowing.] [From Furrow, n.; cf. AS. fyrian.]
   1. To cut a furrow in; to make furrows in; to plow; as, to
      furrow the ground or sea. --Shak.
      [1913 Webster]

   2. To mark with channels or with wrinkles.
      [1913 Webster]

            Thou canst help time to furrow me with age. --Shak.
      [1913 Webster]

            Fair cheeks were furrowed with hot tears. --Byron.
      [1913 Webster]

WordNet (r) 3.0 (2006):

furrowed
    adj 1: having long narrow shallow depressions (as grooves or
           wrinkles) in the surface; "furrowed fields"; "his
           furrowed face lit by a warming smile" [syn: furrowed,
           rugged] [ant: unfurrowed]