1DTCM British English a narrow hole in a door, or a special box outside a house where letters, packages etc are delivered [= mail box American English]
2 British EnglishTCM a box in a post office or street, in which letters are posted [= post box BrE; = mail box AmE]
WORD FOCUS: mail 
things that people send: letter, postcard, package also parcel British English, junk mail
ways of sending mail: first class/second class British English, airmail, surface mail, special delivery
the person who delivers your mail: postman/postwoman British English, mailman American English, letter carrier American English
the place where you buy stamps, send letters and packages etc: post office
the place where you put letters and packages: postbox British English/mailbox American English
the place where you receive letters and packages: letterbox British English/mailbox American English
➔ See also mail

things that people send: letter, postcard, package also parcel British English, junk mail
ways of sending mail: first class/second class British English, airmail, surface mail, special delivery
the person who delivers your mail: postman/postwoman British English, mailman American English, letter carrier American English
the place where you buy stamps, send letters and packages etc: post office
the place where you put letters and packages: postbox British English/mailbox American English
the place where you receive letters and packages: letterbox British English/mailbox American English
➔ See also mail
