Inbox (noun)

1. A folder in an email program where incoming email messages are stored.
2. A queue where messages, tasks, or requests wait to be processed or attended to.

Origin:

The term 'inbox' is a shortened form of the phrase 'incoming box' and has been in use in the english language since the late 20th century.

Examples:

1. She checked her inbox and found several important emails.
2. The customer service representative checked the inbox for new inquiries.
3. The inbox was overflowing with unread messages.
4. He emptied his inbox before going on vacation.
5. She organized her inbox by priority and deadlines.