[1] : The Collaborative International Dictionary of English v.0.48

reverberation \rever`bera"tion\, n. cf. f.
   r'everb'eration.
   the act of reverberating; especially, the act of reflecting
   light or heat, or reechoing sound; as, the reverberation of
   rays from a mirror; the reverberation of rays from a mirror;
   the reverberation of voices; the reverberation of heat or
   flame in a furnace.
   1913 webster

[2] : WordNet (r) 2.0

reverberation
     n 1: the persistence of a sound after its source has stopped
          syn: echo, sound reflection, replication
     2: a remote or indirect consequence of some action; "his
        declaration had unforeseen repercussions"; "reverberations
        of the market crash were felt years later" syn: repercussion
see also:
echo sound reflection replication repercussion 

[3] : Moby Thesaurus II by Grady Ward, 1.0

61 moby thesaurus words for "reverberation":
   acknowledgment, action and reaction, answer, answering, antiphon,
   automatic reaction, autonomic reaction, back answer, back talk,
   backchat, boom, booming, bounceback, comeback, echo, evasive reply,
   growl, growling, grumble, grumbling, predictable response,
   reaction, ready reply, reboation, rebound, receipt, reecho,
   reflection, reflex, reflex action, refluence, reflux, rejoinder,
   repartee, replication, reply, repost, rescript, rescription,
   resound, resounding, respondence, response, responsion, responsory,
   retort, retroaction, return, revulsion, riposte, rise, rumble,
   rumbling, short answer, snappy comeback, thunder, thundering,
   unthinking response, witty reply, witty retort,
   yes-and-no answer

Reverberation >> R Words
Reverberation, definition of term: Reverberation
reverberation_pag1.html