This is the 91st most frequent Japanese word.
開催
"開催" means "holding" or "hosting" (an event).
ここでは、開催は定期的に行われる行事の実施を説明しています。
文化祭は毎年秋に開催される予定です。
The cultural festival is scheduled to be held every autumn.
In this sentence, 開催 refers to the act of holding or organizing an event (the international conference).
来月、この都市で国際会議が開催されます。
Next month, an international conference will be held in this city.
開催 is used here to indicate the organization of a specific event (the sports event).