What Does “under arrest” mean?
Definition:
The phrase under arrest is used to mean that someone is in police custody.
The phrase collocates with the verb ‘be’ or ‘put’ as in:
He is under arrest
They put him under arrest.
Example(s)
He is under arrest for the crime he did years ago.
None of his relatives know that the put him under arrest.
This idiom is in the crime category.