1. the act or process of admitting a patient to a hospital for treatment
Usage: British English spelling; American English uses 'hospitalization'
2. the period of time during which a patient remains in a hospital
Usage: British English spelling; American English uses 'hospitalization'

Examples

• Her hospitalisation lasted three weeks following the surgery.
• The patient's hospitalisation was covered by insurance.
• Emergency hospitalisation was necessary after the accident.
• Long-term hospitalisation can be emotionally challenging for families.
• The doctor recommended hospitalisation for further observation.
• Hospitalisation rates have increased due to the new virus variant.