noun (n)

• the repetition of a sound resulting from reflection of the sound waves(noun.attribute)

  Synonym:
  echo, replication, sound reflection
  

  source: wordnet30
• a remote or indirect consequence of some action(noun.phenomenon)

  Example:
  Reverberations of the market crash were felt years later.
  

  Synonym:
  repercussion
  

  source: wordnet30
• The act of reverberating; especially, the act of reflecting light or heat, or reëchoing 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.(noun)

  source: webster1913