noun (n)

• the act of pursuing in an effort to overtake or capture(noun.act)

  Example:
  The culprit started to run and the cop took off in pursuit.
  

  Synonym:
  chase, following, pursual
  

  source: wordnet30
• a search for an alternative that meets cognitive criteria(noun.cognition)

  Example:
  The pursuit of love.
  

  Synonym:
  pursuance, quest
  

  source: wordnet30
• an auxiliary activity(noun.act)

  Synonym:
  avocation, by-line, hobby, sideline, spare-time activity
  

  source: wordnet30
• a diversion that occupies one's time and thoughts (usually pleasantly)(noun.act)

  Example:
  They criticized the boy for his limited pursuits.
  

  Synonym:
  interest, pastime
  

  source: wordnet30
• The act of following or going after; esp., a following with haste, either for sport or in hostility; chase; prosecution; as, the pursuit of game; the pursuit of an enemy.(noun)

  source: webster1913