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

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "fulminate":
   backfire, bang, bark, blast, blow out, blow up, burst, bust, coal,
   crack, detonate, discharge, explode, feed, fill up, fire, fuel,
   fuel up, go off, let off, oil, pop, refuel, set off, shoot, stoke,
   top off, touch off