noun (n)

• a drastic and far-reaching change in ways of thinking and behaving(noun.event)

  Example:
  The industrial revolution was also a cultural revolution.
  

  source: wordnet30
• the overthrow of a government by those who are governed(noun.act)

  source: wordnet30
• a single complete turn (axial or orbital)(noun.event)

  Example:
  The revolution of the earth about the sun takes one year.
  

  Synonym:
  gyration, rotation
  

  source: wordnet30
• The act of revolving, or turning round on an axis or a center; the motion of a body round a fixed point or line; rotation; as, the revolution of a wheel, of a top, of the earth on its axis, etc.(noun)

  source: webster1913