Source : Webster's Revised Unabridged Dictionary (1913)

Fulminate \Ful"mi*nate\, v. i. [imp. & p. p. {Fulminated}; p.
   pr. & vb. n. {Fulminating}.] [L. fulminatus, p. p. of
   fulminare to lighten, strike with lightning, fr. fulmen
   thunderbolt, fr. fulgere to shine. See {Fulgent}, and cf.
   {Fulmine}.]
   1. To thunder; hence, to make a loud, sudden noise; to
      detonate; to explode with a violent report.

   2. To issue or send forth decrees or censures with the
      assumption of supreme authority; to thunder forth menaces.