Source : Webster's Revised Unabridged Dictionary (1913)

Scream \Scream\, n.
   A sharp, shrill cry, uttered suddenly, as in terror or in
   pain; a shriek; a screech. ``Screams of horror.'' --Pope.

Scream \Scream\, v. i. [imp. & p. p. {Screamed}; p. pr. & vb. n.
   {Screaming}.] [Icel. skr[ae]ma to scare, terrify; akin to Sw.
   skr["a]ma, Dan. skr[ae]mme. Cf. {Screech}.]
   To cry out with a shrill voice; to utter a sudden, sharp
   outcry, or shrill, loud cry, as in fright or extreme pain; to
   shriek; to screech.

         I heard the owl scream and the crickets cry. --Shak.

         And scream thyself as none e'er screamed before.
                                                  --Pope.

Source : WordNet®

scream
     n 1: sharp piercing cry; "her screaming attracted the neighbors"
          [syn: {screaming}, {shriek}, {shrieking}, {screech}, {screeching}]
     2: a high-pitched noise resembling a human cry; "he ducked at
        the screechings of shells"; "he heard the scream of the
        brakes" [syn: {screech}, {screeching}, {shriek}, {shrieking},
         {screaming}]
     3: a joke that seems extremely funny [syn: {belly laugh}, {sidesplitter},
         {howler}, {thigh-slapper}, {wow}, {riot}]
     v 1: utter a sudden loud cry; "she cried with pain when the
          doctor inserted the needle"; "I yelled to her from the
          window but she couldn't hear me" [syn: {shout}, {shout
          out}, {cry}, {call}, {yell}, {holler}, {hollo}, {squall}]
     2: utter or declare in a very loud voice; "You don't have to
        yell--I can hear you just fine" [syn: {yell}]
     3: make a loud, piercing sound; "Fighter planes are screaming
        through the skies"