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WordNet-Online
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Noun postal service has 1 sense
- mail, mail service, postal service, post - the system whereby messages are transmitted via the post office; "the mail handles billions of items every day"; "he works for the United States mail service"; "in England they call mail `the post'"
--1 is a kind of communication, communicating
--1 has particulars: airmail, airpost; snail mail
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