名词

1. (户外的)信箱
A mailbox is a box outside your house where your letters are delivered.

2. 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.

1. a private box for delivery of mail

Synonym: letter box

2. public box for deposit of mail

Synonym: postboxletter box