From Longman Dictionary of Contemporary EnglishRelated topics: Mailpostcardpost‧card /ˈpəʊstkɑːd $ ˈpoʊstkɑːrd/●くろまる●くろまる●くろまるS3 noun [countable]TCMa card that can be sent in the post without an envelope, especially one with a picture on itDon’t forget to send us a postcard!Examples from the Corpuspostcard• Just answer our question on a postcard.• Presumably to keep the costs down, director Bert I.. Gordon shotrealgrasshoppersclimbing up a postcard of the building.• a postcard of the Statue of Liberty• She likes reading, tapestry, competitions, videos and collectingpostcards.• I am sitting on a live postcard.• But you did send me postcards.• Special post boxes will be set up at each walk to receive the postcards.From Longman Business Dictionarypostcardpost‧card /ˈpəʊstkɑːdˈpoʊstkɑːrd/ noun [countable]a small card that can be sent through the post without an envelopeSend us your answer on a postcard.