A clinic (or outpatient clinic or ambulatory care clinic) is a healthcare facility that is primarily focused on the care of outpatients. Clinics can be privately operated or publicly managed and funded. They typically cover the primary healthcare needs of populations in local communities, in contrast to larger hospitals which offer specialised treatments and admit inpatients for overnight stays.

Most commonly, the English word clinic refers to a general medical practice, run by one or more general practitioners, but it can also mean a specialist clinic. Some clinics retain the name "clinic" even while growing into institutions as large as major hospitals or becoming associated with a hospital or medical school.

Clinics are often associated with a general medical practice run by one or several general practitioners. Other types of clinics are run by the type of specialist associated with that type: physical therapy clinics by physiotherapists and psychology clinics by clinical psychologists, and so on for each health profession. (This can even hold true for certain services outside the medical field: for example, legal clinics are run by lawyers.)