Definition of "postcard"

postcard

/ˈpoʊstˌkɑɹd/

noun
plural postcards
1. 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 displays a picture or photograph.
verb
third-person singular simple present postcards, present participle postcarding, simple past and past participle postcarded
1. (transitive) To send a postcard to someone.
2. (transitive) To send by means of a postcard.