The Collaborative International Dictionary of English v.0.48:

Cordon bleu \Cordon bleu\ (k?r`d?n" bl?") [F., blue cordon],
   1. a first-rate cook, or one worthy to be the cook of the
      cordons bleus, or Knights of the Holy Ghost, a
      distinguished order of French knights, famous for their
      good dinners.
      [1913 Webster]

   2. the blue ribbon worn by the Knights of the Holy Ghost.
      [PJC]

   3. [one entitled to wear the cordon bleu[2].] a person of
      high distinction.
      [PJC]

   5. (Cookery) a dish prepared with thin slices of meat
      separated by layers of ham and cheese, and then sauteed;
      as, chicken cordon bleu is a popular dish.
      [PJC]

WordNet (r) 3.0 (2006):

cordon bleu
    n 1: a chef famous for his great skill
    2: an honor or award gained for excellence [syn: blue ribbon,
       cordon bleu]