Definition of "revisionism"

As for Jones’s performance as Mandy Cohen, it united two leading facets of the funnyman’s repertoire: his fondness for female impersonation, and his passion for historical revisionism.

2020 January 22, Stuart Jeffries, “Terry Jones obituary”, in The Guardian‎

Tories spent last week boldly whistling their unique brand of the kind of historical revisionism that has played a major part in getting us here.

2018, Anne Perkins, “A Dad’s Army-style Brexit looms. ‘Don’t panic!’”, in Guardian‎