[countable] a country, a city or an organization that provides the space, services, etc. for a special event and may also arrange it东道主；主办国（或城市、机构）◆The business school is playing host to the conference this year.商学院正主办今年的会议。a country, a city or an area where an organization operates, especially an organization that is based in another country or city东道国；所在城市（或地区）◆The country is now host to 96 multinationals.这国家现在是 96 家跨国公司的东道国。  ➡  host country (IT 信息技术) a computer that provides information or services to other computers that are connected to it（电脑的）主机◆transferring files from the host to your local computer将文档从主机传输到你的本地电脑上◆a host computer电脑主机