A cartoon is a type of two-dimensional illustration, possibly animated. While the specific definition has changed over time, modern usage refers to (a) a typically non-realistic or semi-realistic artistic style of drawing or painting, (b) an image or series of images intended for satire, caricature, or humor, or (c) a motion picture that relies on a sequence of illustrations for its animation. An artist who creates cartoons is called a cartoonist.

The concept originated in the Middle Ages and first described a preparatory drawing for a piece of art, such as a painting, fresco, tapestry, or stained glass window. In the 19th century, it came to refer to humorous illustrations in magazines and newspapers, and after the early 20th century, it referred to comic strips and animated films.

In modern print media, a cartoon is an illustration or series of illustrations, usually humorous in intent. This usage dates from 1843, when Punch magazine applied the term to satirical drawings in its pages, particularly sketches by John Leech. The first of these parodied the preparatory cartoons for grand historical frescoes in the then-new Palace of Westminster. The original title for these drawings was Mr Punch's face is the letter Q and the new title "cartoon" was intended to be ironic, a reference to the self-aggrandizing posturing of Westminster politicians.

Cartoons can be divided into gag cartoons, which include editorial cartoons, and comic strips.

Comics is a medium used to express ideas by images, often combined with text or other visual information. Comics frequently takes the form of juxtaposed sequences of panels of images. Often textual devices such as speech balloons, captions, and onomatopoeia indicate dialogue, narration, sound effects, or other information. Size and arrangement of panels contribute to narrative pacing. Cartooning and similar forms of illustration are the most common image-making means in comics; fumetti is a form which uses photographic images. Common forms of comics include comic strips, editorial and gag cartoons, and comic books. Since the late 20th century, bound volumes such as graphic novels, comic albums, and tankōbon have become increasingly common, and online webcomics have proliferated in the 21st century.

The English term comics is used as a singular noun when it refers to the medium and a plural when referring to particular instances, such as individual strips or comic books. Though the term derives from the humorous (or comic) work that predominated in early American newspaper comic strips, it has become standard also for non-humorous works. It is common in English to refer to the comics of different cultures by the terms used in their original languages, such as manga for Japanese comics, or bandes dessinées for French-language comics. There is no consensus amongst theorists and historians on a definition of comics; some emphasize the combination of images and text, some sequentiality or other image relations, and others historical aspects such as mass reproduction or the use of recurring characters. The increasing cross-pollination of concepts from different comics cultures and eras has further made definition difficult.