postcard
nounUK /ˈpəʊstkɑːd/
US /ˈpoʊstkɑːrd/
A postcard is a small card you send in the mail with a picture on one side and a short message on the other.
She sent me a postcard from the beach showing a big yellow sun.
OTHER MEANINGS
2. A card sold as a souvenir with a photo or drawing of a place.
He bought a postcard of the Eiffel Tower to remember his trip.
3. A blank card used for short written messages sent by mail.
Please write your address on the back of the postcard.
4. A promotional card mailed to advertise a product or event.
The shop mailed a postcard to announce its big sale.