'mailbox' definitions:

Definition of 'mailbox'

From: WordNet
noun
A private box for delivery of mail [syn: mailbox, letter box]
noun
Public box for deposit of mail [syn: postbox, mailbox, letter box]

Definition of 'mailbox'

From: GCIDE
  • mailbox \mail"box`\ n.
  • 1. A public box for deposit of mail, where it is later picked up by the postal authority for delivery.
  • Syn: postbox, letter box. [WordNet 1.5]
  • 2. A private box to recieve delivery of mail. The term is used both for boxes receiving mail delivered by the public postal authority, or by a private services, such as for mail to employees in large corporations.
  • Syn: letter box. [WordNet 1.5 +PJC]
  • 3. (Computers) A location within a computer storage device where electronic mail is held until it is retrieved by the addressee. Creation and use of an electronic mailbox requires special software as well as a data storage device. [PJC]