Meaning: to register your details after arriving for treatment at a hospital, a rehabilitation centre or a health resort
- I had to check into the hospital the night before the operation.
- Amy knew she had a drug problem, but she didn't want to check into a rehab centre.
check into: hospital, rehab, rehabilitation centre, treatment centre, detox centre, clinic, hotel
Note: "Check into" and "check in" can be used to mean the same things, but most people seem to use "check into" more for hospitals and medical centres, and "check in" more for hotels and airline desks.
If someone is addicted to drugs, they should consider checking into