Source : Webster's Revised Unabridged Dictionary (1913)

Necklace \Neck"lace\ (?; 48), n.
   1. A string of beads, etc., or any continuous band or chain,
      worn around the neck as an ornament.

   2. (Naut.) A rope or chain fitted around the masthead to hold
      hanging blocks for jibs and stays.

Source : WordNet®

necklace
     n : jewelry consisting of a cord or chain (often bearing gems)
         worn about the neck as an ornament (especially by women)