Source : Webster's Revised Unabridged Dictionary (1913)

Disorder \Dis*or"der\, v. t. [imp. & p. p. {Disordered}; p. pr.
   & vb. n. {Disordering}.]
   1. To disturb the order of; to derange or disarrange; to
      throw into confusion; to confuse.

            Disordering the whole frame or jurisprudence.
                                                  --Burke.

            The burden . . . disordered the aids and auxiliary
            rafters into a common ruin.           --Jer. Taylor.

   2. To disturb or interrupt the regular and natural functions
      of (either body or mind); to produce sickness or
      indisposition in; to discompose; to derange; as, to
      disorder the head or stomach.

            A man whose judgment was so much disordered by party
            spirit.                               --Macaulay.

   3. To depose from holy orders. [Obs.] --Dryden.

   Syn: To disarrange; derange; confuse; discompose.

Disorder \Dis*or"der\, n. [Pref. dis- + order: cf. F.
   d['e]sordre.]
   1. Want of order or regular disposition; lack of arrangement;
      confusion; disarray; as, the troops were thrown into
      disorder; the papers are in disorder.

   2. Neglect of order or system; irregularity.

            From vulgar bounds with brave disorder part, And
            snatch a grace beyond the reach of art. --Pope.

   3. Breach of public order; disturbance of the peace of
      society; tumult. --Shak.

   4. Disturbance of the functions of the animal economy of the
      soul; sickness; derangement. ``Disorder in the body.''
      --Locke.

   Syn: Irregularity; disarrangement; confusion; tumult; bustle;
        disturbance; disease; illness; indisposition; sickness;
        ailment; malady; distemper. See {Disease}.

Source : WordNet®

disorder
     n 1: condition in which there is a disturbance of normal
          functioning; "the doctor prescribed some medicine for
          the disorder"; "everyone gets stomach upsets from time
          to time" [syn: {upset}]
     2: a condition in which things are not in their expected
        places; "the files are in complete disorder" [syn: {disorderliness}]
        [ant: {orderliness}, {orderliness}]
     3: a disturbance of the peace or of public order [ant: {order}]
     v 1: disturb in mind or make uneasy or cause to be worried or
          alarmed; "She was rather perturbed by the news that her
          father was seriously ill" [syn: {perturb}, {unhinge}, {disquiet},
           {trouble}, {cark}, {distract}]
     2: bring disorder to [syn: {disarray}] [ant: {order}]