a healthcare system in which an organization hires medical professionals and operates medical facilities to provide a wide range of specified services to prepaid subscribers
Origin:
h(ealth) m(aintenance) o(rganization)
See HMO in American Heritage Dictionary 4
noun
A corporation financed by insurance premiums whose member physicians and professional staff provide curative and preventive medicine within certain financial, geographic, and professional limits to enrolled volunteer members and their families.