english
1
general::
Phrase(s): *under arrest arrested and in the custody of the police in preparation for the filing of a charge. (*Typically: be ~; put someone ~.) • Stop where you are! You are under arrest! • Am I under arrest, officer? What did I do?
McGrawhill's American Idioms And Phrasal Verbs
2
general::
In police custody, as in They put him under arrest and charged him with stealing a car. [Late 1300s]
American Heritage Idioms