800 number
noun [ C ] uk/?e?t?h?n.dr?d ?n?m.b?r/ us/?e?t?h?n.dr?d ?n?m.b?/
(美国的)800号码(公司企业或其他提供咨询或信息服务的机构开通的以800开头的免费电话号码)
in the US, a free phone number that begins with 800, provided by companies or other organizations offering advice or information


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