Source : Webster's Revised Unabridged Dictionary (1913)

Thunderstrike \Thun"der*strike`\, v. t. [imp. {Thunderstruck};
   p. p. {Thunderstruck}, {-strucken}; p. pr. & vb. n.
   {Thunderstriking}.]
   1. To strike, blast, or injure by, or as by, lightning. [R.]
      --Sir P. Sidney.

   2. To astonish, or strike dumb, as with something terrible;
      -- rarely used except in the past participle.

            drove before him, thunderstruck.      --Milton.

Thunderstrike \Thun"der*strike`\, v. t. [imp. {Thunderstruck};
   p. p. {Thunderstruck}, {-strucken}; p. pr. & vb. n.
   {Thunderstriking}.]
   1. To strike, blast, or injure by, or as by, lightning. [R.]
      --Sir P. Sidney.

   2. To astonish, or strike dumb, as with something terrible;
      -- rarely used except in the past participle.

            drove before him, thunderstruck.      --Milton.

Source : WordNet®

thunderstruck
     adj : as if struck dumb with astonishment and surprise; "a circle
           of policement stood dumbfounded by her denial of having
           seen the accident"; "the flabbergasted aldermen were
           speechless"; "was thunderstruck by the news of his
           promotion" [syn: {dumbfounded}, {dumfounded}, {flabbergasted},
            {stupefied}]