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Definition of 800 number
: a toll-free telephone number for long-distance calls that is prefixed by the number 800
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First Known Use of 800 number
1971
800 NUMBER Defined for English Language Learners
800 number
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noun
Definition of 800 number for English Language Learners
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: a telephone number that people can use to call a distant place (such as a business) for free
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