hospitalization UK /ˌhɒs.pɪ.tə.laɪˈzeɪ.ʃn̩/US /ˌhɑ(ː)s.pɪ.tə.lɪˈzeɪ.ʃən/ noun2 •The hospitalizing of a patient, the condition of being hospitalized, or the period a patient stays in hospital. •Insurance that pays a patient's expenses. formshospitalizations