Source : Webster's Revised Unabridged Dictionary (1913)

Thunder \Thun"der\, v. i. [imp. & p. p. {Thundered}; p. pr. &
   vb. n. {Thundering}.] [AS. [thorn]unrian. See {Thunder}, n.]
   1. To produce thunder; to sound, rattle, or roar, as a
      discharge of atmospheric electricity; -- often used
      impersonally; as, it thundered continuously.

            Canst thou thunder with a voice like him? --Job xl.
                                                  9.

   2. Fig.: To make a loud noise; esp. a heavy sound, of some
      continuance.

            His dreadful voice no more Would thunder in my ears.
                                                  --Milton.

   3. To utter violent denunciation.

Thunder \Thun"der\, n. [OE. [thorn]under, [thorn]onder,
   [thorn]oner, AS. [thorn]unor; akin to [thorn]unian to
   stretch, to thunder, D. donder thunder, G. donner, OHG.
   donar, Icel. [thorn][=o]rr Thor, L. tonare to thunder,
   tonitrus thunder, Gr. to`nos a stretching, straining, Skr.
   tan to stretch. [root]52. See {Thin}, and cf. {Astonish},
   {Detonate}, {Intone}, {Thursday}, {Tone}.]
   1. The sound which follows a flash of lightning; the report
      of a discharge of atmospheric electricity.

   2. The discharge of electricity; a thunderbolt. [Obs.]

            The revenging gods 'Gainst parricides did all their
            thunders bend.                        --Shak.

   3. Any loud noise; as, the thunder of cannon.

   4. An alarming or statrling threat or denunciation.

            The thunders of the Vatican could no longer strike
            into the heart of princes.            --Prescott.

   {Thunder pumper}. (Zo["o]l.)
      (a) The croaker ({Haploidontus grunniens}).
      (b) The American bittern or stake-driver.

   {Thunder rod}, a lightning rod. [R.]

   {Thunder snake}. (Zo["o]l.)
      (a) The chicken, or milk, snake.
      (b) A small reddish ground snake ({Carphophis, or Celuta,
          am[oe]na}) native to the Eastern United States; --
          called also {worm snake}.

   {Thunder tube}, a fulgurite. See {Fulgurite}.

Thunder \Thun"der\, v. t.
   To emit with noise and terror; to utter vehemently; to
   publish, as a threat or denunciation.

         Oracles severe Were daily thundered in our general's
         ear.                                     --Dryden.

         An archdeacon, as being a prelate, may thunder out an
         ecclesiastical censure.                  --Ayliffe.

Source : WordNet®

thunder
     v 1: move fast, noisily, and heavily; "The bus thundered down the
          road"
     2: utter words loudly and forcefully; "`Get out of here,' he
        roared" [syn: {roar}]
     3: be the case that thunder is being heard; "Whenever it
        thunders, my dog crawls under the bed" [syn: {boom}]
     4: to make or produce a loud noise; "The river thundered
        below"; "The engine roared as the driver pushed the car to
        full throttle"

thunder
     n 1: a deep prolonged loud noise [syn: {boom}, {roar}, {roaring}]
     2: a booming or crashing noise caused by air expanding along
        the path of a bolt of lightning
     3: street names for heroin [syn: {big H}, {hell dust}, {nose
        drops}, {smack}]