What is the meaning of reverberation?

noun

• The repetition of a sound resulting from reflection of the sound waves.
  • usage: "she could hear echoes of her own footsteps"
  • synonyms: echo, sound reflection, replication
• A remote or indirect consequence of some action.
  • usage: "his declaration had unforeseen repercussions"; "reverberations of the market crash were felt years later"
  • synonyms: repercussion