1. (noun) a numbered compartment in a post office where mail is put to be called for

• call box
• po box
• pob
• post-office box

2. (noun) public box for deposit of mail

• mailbox
• postbox

3. (noun) a private box for delivery of mail

• mailbox

1. (noun) a numbered compartment in a post office where mail is put to be called for

• compartment

2. (noun) public box for deposit of mail

• maildrop

3. (noun) a private box for delivery of mail

• box

1. (noun) public box for deposit of mail

• pillar box