Other forms: postcards
A postcard is the picture card you send from holidays with two lines of greetings. Send a postcard, a seaside postcard, write the postcard.
It is open by design, so anybody handling it can read it — which is why the law once limited what could be written on one and why the messages are so short and so cheerful. Deltiology is the collecting of them, and it is a large hobby.
1nounpostcardA card with a picture, sent by post without an envelope.
“We sent my grandparents a postcard from the beach with a picture of the harbour.”
postcard is a card.
From post + card.
Etymology from Wiktionary, CC BY-SA