What is the meaning of Inbox?

A container in which papers to be dealt with are put.

An electronic folder serving the same purpose, but for electronic files, especially email.

The aggregate of items that demand one's attention or effort.

To put (something) in someone's inbox.

To communicate with (a person) by writing to their electronic inbox.

inbox (folder for incoming electronic files such as emails)

inbox

an inbox

private message, PM

to send someone such messages

Source: wiktionary.org