noun (n)

• a clear appearance(noun.event)

  Example:
  A manifestation of great emotion.
  

  source: wordnet30
• a manifest indication of the existence or presence or nature of some person or thing(noun.communication)

  Example:
  A manifestation of disease.
  

  source: wordnet30
• an appearance in bodily form (as of a disembodied spirit)(noun.event)

  Synonym:
  materialisation, materialization
  

  source: wordnet30
• expression without words(noun.communication)

  Synonym:
  expression, reflection, reflexion
  

  source: wordnet30
• a public display of group feelings (usually of a political nature)(noun.act)

  Synonym:
  demonstration
  

  source: wordnet30
• The act of manifesting or disclosing, or the state of being manifested; discovery to the eye or to the understanding; also, that which manifests; exhibition; display; revelation; as, the manifestation of God's power in creation.(noun)

  source: webster1913