National Insurance
noun [ U ] uk/ˌnæʃ.ən.əl ɪnˈʃɔː.rəns/ us/ˌnæʃ.ən.əl ɪnˈʃɔːr.əns/
（英国的）国民保险制度
a system in the UK in which the government collects money from companies and workers and makes payments to people who are too old or ill to work or who have no job