opening ceremony

noun
UK /ˈəʊpənɪŋ ˈserɪməni/
US /ˈoʊpənɪŋ ˈserəmoʊni/

A special event that marks the start of something.

We watched the opening ceremony of the Olympic Games on TV.


OTHER MEANINGS

2. The first part of a formal event where speeches and performances welcome guests.

The conference began with an opening ceremony featuring the mayor.

3. A ceremony held to officially open a new building or place.

The opening ceremony of the new library drew a big crowd.

4. The formal start of a school or academic year.

Students gathered for the opening ceremony on the first day of school.