Postcard (noun)

1. A card for sending a message through the mail, typically having a photograph or other illustration on one side.
2. A message written on a postcard.

Origin:

From post + card, first recorded in 1873.

Examples:

1. He sent her a postcard from his vacation.
2. The postcard had a picture of the beach on the front.
3. She collected postcards from all the places she visited.
4. I will send you a postcard from my trip.
5. The postcard had a message on the back, written in cursive.