Source : Webster's Revised Unabridged Dictionary (1913)

Disguise \Dis*guise"\ (?; 232), v. t. [imp. & p. p. {Disguised};
   p. pr. & vb. n. {Disguising}.] [OE. desguisen, disgisen,
   degisen, OF. desguisier, F. d['e]guiser; pref. des- (L. dis-)
   + guise. See {Guise}.]
   1. To change the guise or appearance of; especially, to
      conceal by an unusual dress, or one intended to mislead or
      deceive.

            Bunyan was forced to disguise himself as a wagoner.
                                                  --Macaulay.

   2. To hide by a counterfeit appearance; to cloak by a false
      show; to mask; as, to disguise anger; to disguise one's
      sentiments, character, or intentions.

            All God's angels come to us disguised. --Lowell.

   3. To affect or change by liquor; to intoxicate.

            I have just left the right worshipful, and his
            myrmidons, about a sneaker or five gallons; the
            whole magistracy was pretty well disguised before I
            gave them the ship.                   --Spectator.

   Syn: To conceal; hide; mask; dissemble; dissimulate; feign;
        pretend; secrete. See {Conceal}.

Disguise \Dis*guise"\, n.
   1. A dress or exterior put on for purposes of concealment or
      of deception; as, persons doing unlawful acts in disguise
      are subject to heavy penalties.

            There is no passion steals into the heart more
            imperceptibly and covers itself under more
            disguises, than pride.                --Addison.

   2. Artificial language or manner assumed for deception; false
      appearance; counterfeit semblance or show.

            That eye which glances through all disguises. --D.
                                                  Webster.

   3. Change of manner by drink; intoxication. --Shak.

   4. A masque or masquerade. [Obs.]

            Disguise was the old English word for a masque. --B.
                                                  Jonson.

Source : WordNet®

disguise
     n 1: an outward semblance that misrepresents the true nature of
          something; "the theatrical notion of disguise is always
          associated with catastrophe in his stories" [syn: {camouflage}]
     2: any attire that modifies the appearance in order to conceal
        the wearer's identity
     3: the act of concealing the identity of something by modifying
        its appearance; "he is a master of disguise" [syn: {camouflage}]
     v : make unrecognizable; "The herb disguises the garlic taste";
         "We disguised our faces before robbing the bank"