
1) American invention 2) Card 3) Contest entry 4) Mailed memento 5) Mailing-card 6) Post card 7) Postal card 8) Vacation mailing 9) Wish you were here medium
Found on
https://www.crosswordclues.com/clue/postcard

1) Lettercard
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https://www.crosswordclues.com/clue/postcard

A postcard or post card is a rectangular piece of thick paper or thin cardboard intended for writing and mailing without an envelope. Other shapes then rectangular may also be used. There are novelty exceptions, such as wood postcards, made of thin wood, and copper postcards sold in the Copper Country of the U.S. state of Michigan, and coconut `p....
Found on
http://en.wikipedia.org/wiki/Postcard

(from the article `postal system`) ...but quickly expanded, under the vigorous pressure of vested interests, to cover all sorts of commercial documents, advertising matter, magazines, ...
Found on
http://www.britannica.com/eb/a-z/p/100

Card with space for a written message that can be sent through the mail without an envelope. The postcard's inventor was Emmanual Hermann, of Vienna, who in 1869 proposed a `postal telegram`,...
Found on
http://www.encyclo.co.uk/local/20688

A card specifically made with the intention that it could be used by itself as a mailed message or souvenir
Found on
http://www.encyclo.co.uk/visitor-contributions.php

See also MAIL ART (345), PICTURE POSTCARD (429) A card upon which a message can be written and posted
Found on
http://www.ifla.org/VII/s30/pub/mg1.htm#5

Single sheet self-mailer on card stock.
Found on
http://www.nmoa.org/Library/index.htm

[
n] - a card for sending messages by post without an envelope
Found on
http://www.webdictionary.co.uk/definition.php?query=postcard
post card noun a card for sending messages by post without an envelope
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.