同時
Meanings
1
Used as a noun or adverbially with に to indicate that two events happen at the same time.
They arrived at the same time.
A phone call and an email came at the same time.
2
noun-modifying (irregular)
simultaneous; concurrent; synchronous
Prenominal use modifying a noun to describe events, actions, or processes that occur at the same time.
Simultaneous interpretation is a very difficult job.
I'm managing two concurrent projects.
Usage patterns
- 〈事〉と〈事〉が同時に起こるfor two events to happen at the same time
The earthquake and the power outage happened at the same time.
- 〈動詞〉と同時にas soon as / at the same moment as doing something
He shouted the moment he opened the door.