a mailing card produced by the post office, as opposed to a privately produced post card. A postal card has a stamp-like indicium. Since 1999 Postal Cards have been sold for 1¢ over face value. Scott numbers begin with UX. see also Denominated Postal Cards.

a card for sending messages by post without an envelope

a typically rectangular piece of thick paper or thin cardboard intended to write on and be mailed without an envelope and at a lower rate than a letter