return mail
noun/rɪˌtɜːn ˈmeɪl/
/rɪˌtɜːrn ˈmeɪl/
[uncountable] (North American English)- mail that is sent as a reply or response to something
- This is where the return mail is received and read.
- by return mail Please reply to this letter by return mail (= as soon as possible).
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return mail