noun (n)

• the act of vibrating(noun.act)

  Synonym:
  quiver, quivering
  

  source: wordnet30
• a shaky motion(noun.state)

  Synonym:
  palpitation, quiver, quivering, shakiness, shaking, trembling
  

  source: wordnet30
• (physics) a regular periodic variation in value about a mean(noun.event)

  Synonym:
  oscillation
  

  source: wordnet30
• a distinctive emotional aura experienced instinctively(noun.attribute)

  Example:
  That place gave me bad vibrations.
  

  Synonym:
  vibe
  

  source: wordnet30
• The act of vibrating, or the state of being vibrated, or in vibratory motion; quick motion to and fro; oscillation, as of a pendulum or musical string.(noun)

  source: webster1913