mail service

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the system whereby messages are transmitted via the post office
- the mail handles billions of items every day
- he works for the United States mail service
- in England they call mail 'the post'
• Syn:
mail, postal service, post
• Derivationally related forms:
postal (for: post), post (for: post), mail (for: mail)
• Hypernyms:
communication, communicating
• Hyponyms:
airmail, airpost, snail mail, rural free delivery, RFD