historical in WordNet English dictionary

1. used of the study of a phenomenon (especially language) as it changes through time
   "diachronic linguistics"
   diachronic  historical 
   
2. belonging to the past; of what is important or famous in the past
   "historic victories"; "historical (or historic) times"; "a historical character"
   historic  historical 
   
3. of or relating to the study of history
   "historical scholars"; "a historical perspective"
   historical 
   
4. having once lived or existed or taken place in the real world as distinct from being legendary
   "the historical Jesus"; "doubt that a historical Camelot every existed"; "actual historical events"
   historical