envelope

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

envelope UK [ˈen.və.ləʊp] US [ˈɑːn.və.loʊp] noun countable [ envelopes ]
<A > a flat, usually square or rectangular, paper container for a letter
Thesaurus⁺: ↑Letters, notes and cards ↑Paper and stationery
 
• I folded the letter in half and put it in an envelope.
• Send a self-addressed envelope for our free catalogue.
• An envelope was waiting for me when I got home.
• Do you recognise the writing on the envelope?
• The teacher opened the sealed envelope containing the exam papers.
Idiom: on the back of an envelope