encaenia
/ɛnˌkeɪˈniːə/ (en-KAY-nee-uh)
Definitions
1. noun
A ceremony of inauguration, especially of a university or a public building.
“The university celebrated its grand encaenia with a grand procession and a speech from the chancellor.”
2. noun
A memorial or a celebration of a notable event.
“The encaenia of the city’s founding was held every decade to commemorate the occasion.”