noun (n)

• the tendency for a memory or idea to persist or recur without any apparent stimulus for it(noun.cognition)

  source: wordnet30
• the act of persisting or persevering; continuing or repeating behavior(noun.act)

  Example:
  His perseveration continued to the point where it was no longer appropriate.
  

  Synonym:
  perseverance, persistence
  

  source: wordnet30