bicentenary
1. [ adjective ] of or relating to or completing a period of 200 years
Synonyms: bicentennial
Examples:

"bicentennial celebration"

Related terms: centennial centennial bicentennial
2. [ noun ] the 200th anniversary (or the celebration of it)
Synonyms: bicentennial
Related terms: anniversary
Similar spelling:   bicentric
  bicentennial
  bisontine