noun
- a boxlike tray, basket, or the like, as on a desk, for holding incoming mail, messages, or work.
- Computers. a folder for receiving and storing incoming e-mails or text messages.
noun
- (on a computer) a folder in a mailbox in which incoming messages are stored and displayed
- a US and Canadian name for in-tray
by 1984 in electronic mail sense, from in + mailbox (n.). Cf. in-basket, in reference to office mail systems, by 1940.