一斉
Meanings
1
Describes an action performed by many people or things at the same time, often in an organized or coordinated manner. Commonly used with に as an adverb.
The students stood up all at once.
The police launched a simultaneous investigation.
Usage patterns
- 〈人〉が一斉に〈動詞〉for a group of people to do something all at once
On hearing the news, the students all stood up at once.
- 〈場所〉で一斉に〈動詞〉for something to happen simultaneously across a place
School closures were announced simultaneously at schools across the country.