- (户外的)信箱
A mailbox is a box outside your house where your letters are delivered.
- 公共邮箱;公用邮筒
A mailbox is a metal box in a public place, where you put letters and packets to be collected. They are then sorted and delivered.
in BRIT, use 英国英语用 post box
- 电子信箱
On a computer, your mailbox is the file where your e-mail is stored.