An antinovel is any experimental work of fiction that avoids the familiar conventions of the novel, and instead establishes its own conventions.
The term ("anti-roman" in French) was brought into modern literary discourse by the French philosopher and critic Jean-Paul Sartre in his introduction to Nathalie Sarraute's 1948 work Portrait d’un inconnu (Portrait of a Man Unknown). However the term "anti-roman" (anti-novel) had been used by Charles Sorel in 1633 to describe the parodic nature of his prose fiction Le Berger extravagant.
The antinovel usually fragments and distorts the experience of its characters, presenting events outside of chronological order and attempting to disrupt the idea of characters with unified and stable personalities. Some principal features of antinovels include: lack of obvious plot, minimal development of character, variations in time sequence, experiments with vocabulary and syntax, and alternative endings and beginnings. Extreme features may include detachable or blank pages, drawings, and hieroglyphics.