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 negationism, concerted denial of claims accepted by mainstream historians, may purport to be historical revisionism but its methodologies have no basis in historiography/profession of history
  • Revisionist School of Islamic Studies, which questions whether the traditional accounts about Islam's early times are reliable historical sources
• Revisionism (Ireland), an issue in Irish historiography
• Revisionism (Spain), a derogatory term used in Spanish historiographic debate
• 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