This is the 3145th most frequent Korean word.
개최했다
"Hosted" or "Held."
Here, '개최했다' is used to indicate that the city organized and held a film festival.
그 도시는 국제 영화제를 개최했다.
The city hosted an international film festival.
In this instance, '개최했다' signifies that the school took charge of arranging and holding the science fair.
학교는 새로운 과학 박람회를 개최했다.
The school organized a new science fair.
Here, '개최했다' describes the act of the company arranging and conducting a technology exhibition.