to confine or hold in custody in English:

I won’t detain you any longer

When you detain someone, you hold them back, slow them down, or stop them from moving on. If you are detained by the police, you may be late for the big football game

When police keep a suspect at the station for questioning, this is an example of a situation where the police detain the suspect.

A ​suspect is being detained by the ​police for ​further questioning.

1. Three men were detained by police for questioning. 2. I won't detain you any longer. Go to your children!

‘she was detained without trial for two years’

He's been detained by security because of his suspicious behaviour at the airport.

He had been seen at the crime site and later the police detained him for questioning.