sending to prison; committing to prison
Refers to the act of sending someone to prison, often used in legal or news contexts.
The judge sentenced the defendant to prison.
The criminal was immediately sent to prison.
収監 is a more formal term for imprisonment, while 刑務所送り is a compound noun emphasizing the act of sending someone to prison.
Compound of 刑務所 (prison) and 送り (sending).