Pictorial images, usually drawings, that are humorous or that use wit and satire to comment on contemporary events, social habits, political trends, or other topical subjects, often executed in a broad or abbreviated manner. Originally referred to full-page illustrations in a circulating paper or periodical, especially when comical and relating to current events.

Souce: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300123430