The Collaborative International Dictionary of English v.0.48:

Ring \Ring\, v. t. [imp. & p. p. Ringed; p. pr. & vb. n.
   Ringing.]
   1. To surround with a ring, or as with a ring; to encircle.
      "Ring these fingers." --Shak.
      [1913 Webster]

   2. (Hort.) To make a ring around by cutting away the bark; to
      girdle; as, to ring branches or roots.
      [1913 Webster]

   3. To fit with a ring or with rings, as the fingers, or a
      swine's snout.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ringed \Ringed\, a.
   1. Encircled or marked with, or as with, a ring or rings.
      [1913 Webster]

   2. Wearning a wedding ring; hence, lawfully wedded. "A ringed
      wife." --Tennyson.
      [1913 Webster]

   Ringed seal (Zool.), a North Pacific seal (Phoca foetida)
      having ringlike spots on the body.

   Ringed snake (Zool.), a harmless European snake
      (Tropidonotus natrix) common in England.

   Ringed worm (Zool.), an annelid.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ringed
    adj 1: shaped like a ring [syn: annular, annulate,
           annulated, circinate, ringed, ring-shaped,
           doughnut-shaped]
    2: having colored rings around the body
    3: wearing a wedding ring; lawfully married; "a ringed wife"-
       Tennyson

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "ringed":
   begirt, belted, cinctured, circled, circumscribed, circumscript,
   defined, definite, delimited, demarcated, determinate, determined,
   encinctured, encircled, fixed, girdled, girt, hedged about, set,
   specific, stated, surrounded, zoned