tercentenary
/ˌtɜrsɛnˈtɛnəri/
noun
- A 300th anniversary or the celebration of it.
- They planned a grand ball to celebrate the tercentenary of the founding of the city.
- The university published a special book to mark its tercentenary.
- The town held a parade and fireworks for its tercentenary.
adjective
- Relating to a 300th anniversary.
- A tercentenary medal was struck to honor the event.
- The tercentenary celebrations lasted an entire week.
- The tercentenary exhibition featured artifacts from three centuries ago.