envelope
noun[C]
uk/ˈen.və.ləʊp/us/ˈɑːn.və.loʊp/A2
aflat, usuallysquareorrectangular,papercontainerfor aletter
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- Ifoldedtheletterinhalfand put it in an envelope.
- Send aself-addressedenvelope forourfreecatalogue.
- An envelope waswaitingfor me when I gothome.
- Do yourecognizethe writing on the envelope?
- Theteacheropenedthesealedenvelopecontainingtheexampapers.
Letters, notes and cards
- aerogramme
- air letter
- billet-doux
- chain letter
- Christmas card
- correspondence
- greetings card
- handbill
- hate mail
- invitation
- invite
- junk mail
- love letter
- poison-pen letter
- postcard
- PPS
- PS
- round robin
- RSVP
- wire
Idioms
on the back of an envelope
push the envelope