The Collaborative International Dictionary of English v.0.48:

Groove \Groove\, v. t. [imp. & p. p. Grooved; p. pr. & vb. n.
   Groving.]
   To cut a groove or channel in; to form into channels or
   grooves; to furrow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

grooved \grooved\ adj.
   1. [p. p. groove] having grooves; as, a record is a grooved
      disk.
      [WordNet 1.5]

   2. marked by thin parallel marks or channels.

   Syn: canaliculate.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

grooved
    adj 1: established as if settled into a groove or rut [syn:
           grooved, well-grooved]