The Collaborative International Dictionary of English v.0.48:

Ring \Ring\ (r[i^]ng), v. t. [imp. Rang (r[a^]ng) or Rung
   (r[u^]ng); p. p. Rung; p. pr. & vb. n. Ringing.] [AS.
   hringan; akin to Icel. hringja, Sw. ringa, Dan. ringe, OD.
   ringhen, ringkelen. [root]19.]
   1. To cause to sound, especially by striking, as a metallic
      body; as, to ring a bell.
      [1913 Webster]

   2. To make (a sound), as by ringing a bell; to sound.
      [1913 Webster]

            The shard-borne beetle, with his drowsy hums,
            Hath rung night's yawning peal.       --Shak.
      [1913 Webster]

   3. To repeat often, loudly, or earnestly.
      [1913 Webster]

   To ring a peal, to ring a set of changes on a chime of
      bells.

   To ring the changes upon. See under Change.

   To ring in or To ring out, to usher, attend on, or
      celebrate, by the ringing of bells; as, to ring out the
      old year and ring in the new. --Tennyson.

   To ring the bells backward, to sound the chimes, reversing
      the common order; -- formerly done as a signal of alarm or
      danger. --Sir W. Scott.
      [1913 Webster]

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:

Ringing \Ring"ing\,
   a & n. from Ring, v.
   [1913 Webster]

   Ringing engine, a simple form of pile driver in which the
      monkey is lifted by men pulling on ropes.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ringing
    n 1: the sound of a bell ringing; "the distinctive ring of the
         church bell"; "the ringing of the telephone"; "the
         tintinnabulation that so voluminously swells from the
         ringing and the dinging of the bells"--E. A. Poe [syn:
         ring, ringing, tintinnabulation]
    2: the giving of a ring as a token of engagement
    3: having the character of a loud deep sound; the quality of
       being resonant [syn: plangency, resonance,
       reverberance, ringing, sonorousness, sonority,
       vibrancy]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "ringing":
   booming, change ringing, chime, chiming, chink, clang, clanging,
   clangor, clank, clanking, clink, consonant, deafening, ding,
   ding-a-ling, dingdong, dinging, dingle, donging, ear-piercing,
   ear-rending, ear-splitting, earthshaking, forte, fortissimo, full,
   jangle, jingle, jingle-jangle, jingling, knell, knelling, loud,
   loud-sounding, loudish, orotund, peal, peal ringing, pealing,
   piercing, plangent, resounding, ring, rotund, round, sonorous,
   sounding, stentoraphonic, stentorian, stentorious, thunderous,
   ting, ting-a-ling, tingle, tingling, tink, tinkle, tinkling,
   tinnitus, tintinnabular, tintinnabulary, tintinnabulous, toll,
   tolling, tonitruant, tonitruous, vibrant, window-rattling