- a patient who receives treatment at a hospital, as in an emergency room or clinic, but is not hospitalized.
- a nonresident hospital patientCompare inpatient
n.also out-patient, 1715, “person who is treated at a hospital but not admitted,” from out + patient (n.). The adjective is first recorded 1879. n.
- A patient who is admitted to a hospital or clinic for treatment that does not require an overnight stay.