Revisionism may refer to:
- Historical revisionism, the critical re-examination of presumed historical facts and existing historiography
- The "revisionists" school of thought in Soviet and Communist studies, as opposed to the Cold War "traditionalists" school.
- Historical revisionism (negationism), a particular form of historical revisionism concerned with the denial of facts accepted by mainstream historians
- Holocaust denial, any of various claims that standard scholarly descriptions of the Holocaust are substantially erroneous, particularly the denials made by David Irving
- Revisionist Zionism, a nationalist faction within the Zionist movement
- Marxist revisionism, a pejorative term used by some Marxists to describe ideas based on a revision of fundamental Marxist premises
- Fictional revisionism, the retelling of a story with substantial alterations in character or environment, to "revise" the view shown in the original work
- Territorial revisionism, a euphemism for revanchism or irredentism
- Revisionism Theory, another word for Reformism
- The reevaluation of one's experiences with a hindsight bias.