The Collaborative International Dictionary of English v.0.48:

Fulminate \Ful"mi*nate\, v. t.
   1. To cause to explode. --Sprat.
      [1913 Webster]

   2. To utter or send out with denunciations or censures; --
      said especially of menaces or censures uttered by
      ecclesiastical authority.
      [1913 Webster]

            They fulminated the most hostile of all decrees.
                                                  --De Quincey.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fulminate \Ful"mi*nate\, n. [Cf. P. fulminate. See Fulminate,
   v. i.] (Chem.)
      (a) A salt of fulminic acid. See under Fulminic.
      (b) A fulminating powder.
          [1913 Webster]

   Fulminate of gold, an explosive compound of gold; -- called
      also fulminating gold, and aurum fulminans.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   2. To issue or send forth decrees or censures with the
      assumption of supreme authority; to thunder forth menaces.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fulminate
    n 1: a salt or ester of fulminic acid
    v 1: criticize severely; "He fulminated against the Republicans'
         plan to cut Medicare"; "She railed against the bad social
         policies" [syn: fulminate, rail]
    2: come on suddenly and intensely; "the disease fulminated"
    3: cause to explode violently and with loud noise