A short, informal letter
The definition of a letter is a symbol representing a speech sound or a written message.
A card sold by the post office, with the postage printed on it for mailing without an envelope, used to send short messages
a card for sending messages by post without an envelope
Find another word for postcard. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for postcard, like: note, letter card, letter, postal card, post card, poster, mailing-card, photo, photograph, souvenir and postcards.