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.

(transitive) To send a postcard to. / (transitive) To send by means of a postcard.

plural of postcard

The sending of postcards.

simple past tense and past participle of postcard

(idiomatic) A brief answer or opinion. / Used other than figuratively or idiomatically: see answer, on, a, postcard.

plural of answer on a postcard

A postcard bearing a picture. / (when used attributively, figuratively) Scenic, like the image on a postcard.

plural of picture postcard

(computing) A software product whose author requests as payment a postcard from the user's hometown.