opening ceremony
nounUK /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.