Source : Webster's Revised Unabridged Dictionary (1913)

Chaperon \Chap"er*on\, n. [F. chaperon. See {Chape}, {Cape},
   {Cap}.]
   1. A hood; especially, an ornamental or an official hood.

            His head and face covered with a chaperon, out of
            which there are but two holes to look through.
                                                  --Howell.

   2. A device placed on the foreheads of horses which draw the
      hearse in pompous funerals.

   3. A matron who accompanies a young lady in public, for
      propriety, or as a guide and protector.

Chaperon \Chap"er*on\, v. t. [imp. & p. p. {Chaperoned}; p. pr.
   & vb. n. {Chaperoning}.] [Cf. F. chaperonner, fr. chaperon.]
   To attend in public places as a guide and protector; to
   matronize.

         Fortunately Lady Bell Finley, whom I had promised to
         chaperon, sent to excuse herself.        --Hannah More.

Source : WordNet®

chaperon
     n : one who accompanies and supervises a young woman or
         gatherings of young people [syn: {chaperone}]
     v : accompany as a chaperone [syn: {chaperone}]