Source : Webster's Revised Unabridged Dictionary (1913)

Riot \Ri"ot\, n. [OF. riote, of uncertain origin; cf. OD. revot,
   ravot.]
   1. Wanton or unrestrained behavior; uproar; tumult.

            His headstrong riot hath no curb.     --Shak.

   2. Excessive and exxpensive feasting; wild and loose
      festivity; revelry.

            Venus loveth riot and dispense.       --Chaucer.

            The lamb thy riot dooms to bleed to-day. --Pope.

   3. (Law) The tumultuous disturbance of the public peace by an
      unlawful assembly of three or more persons in the
      execution of some private object.

   {To run riot}, to act wantonly or without restraint.

Riot \Ri"ot\, v. i. [imp. & p. p. {Rioted}; p. pr. & vb. n.
   {Rioting}.] [OF. rioter; cf. OD. ravotten.]
   1. To engage in riot; to act in an unrestrained or wanton
      manner; to indulge in excess of luxury, feasting, or the
      like; to revel; to run riot; to go to excess.

            Now he exact of all, wastes in delight, Riots in
            pleasure, and neglects the law.       --Daniel.

            No pulse that riots, and no blood that glows.
                                                  --Pope.

   2. (Law) To disturb the peace; to raise an uproar or
      sedition. See {Riot}, n., 3. --Johnson.

Riot \Ri"ot\, v. t.
   To spend or pass in riot.

         [He] had rioted his life out.            --Tennyson.

Source : WordNet®

riot
     n 1: a public act of violence by an unruly mob [syn: {public
          violence}]
     2: a state of disorder involving group violence [syn: {rioting}]
     3: a joke that seems extremely funny [syn: {belly laugh}, {sidesplitter},
         {howler}, {thigh-slapper}, {scream}, {wow}]
     4: a wild gathering involving excessive drinking and
        promiscuity [syn: {orgy}, {debauch}, {debauchery}, {saturnalia},
         {bacchanal}, {bacchanalia}, {drunken revelry}]

riot
     v 1: take part in a riot; disturb the public peace by engaging in
          a riot; "Students were rioting everywhere in 1968"
     2: engage in boisterous, drunken merry-making; "They were out
        carousing last night" [syn: {carouse}, {roister}]