from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A rectangular piece of thick paper or thin cardboard intended to be written on and mailed without an envelope. In the case of a picture postcard one side carries a picture or photograph.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a card for sending messages by post without an envelope
post + card (Wiktionary)