What is the meaning of historical?

adjective

• Of or relating to the study of history.
  • usage: "historical scholars"; "a historical perspective"
• Having once lived or existed or taken place in the real world as distinct from being legendary.
  • usage: "the historical Jesus"; "doubt that a historical Camelot every existed"; "actual historical events"
• Belonging to the past; of what is important or famous in the past.
  • usage: "historic victories"; "historical (or historic) times"; "a historical character"
  • synonyms: historic
• Used of the study of a phenomenon (especially language) as it changes through time.
  • usage: "diachronic linguistics"
  • synonyms: diachronic