health maintenance organization
noun [ C ] US uk/ˌhelθ ˈmeɪn.tən.əns ɔː.ɡən.aɪˌzeɪ.ʃən/ us/ˌhelθ ˈmeɪn.tən.əns ɔːr.ɡən.əˌzeɪ.ʃən/ (abbreviation HMO)
（为缴纳固定费用而非按服务缴费的患者提供医疗服务的）健康维护组织
an organization that employs doctors and other medical people to provide healthcare to people who pay a fixed amount to the organization rather than an amount based on each service they get