Definition of revisionism

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

Fictional revisionism, the retelling of a story with substantial alterations in character or environment, to "revise" the view shown in the original work

Marxist revisionism, a pejorative term used by some Marxists to describe ideas based on a revision of fundamental Marxist premises

Revisionism (Ireland), an issue in Irish historiography

Revisionism (Spain), a derogatory term used in Spanish historiographic debate

Revisionism theory, another word for reformism

Revisionist Zionism, a nationalist faction within the Zionist movement

Territorial revisionism, a euphemism for revanchism or irredentism

The reevaluation of one's experiences with a hindsight bias