The act of expurgating, purging, or cleansing; purification from anything noxious, offensive, sinful, or erroneous.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "expurgation" in a sentence
"For example, if you’re asked if you’ve ever been convicted, when do you still have to say “yes” (because it * did* happen), and when can you answer no since the expurgation is supposed to let you pretend it never happened?"
"Suzman says the letter in the novel is an expurgation of how he wished he could have been with his mother."
"Upon a closer investigation, however, it became evident that the task of expurgation would prove to be a most formidable one, and that a great mass of extraneous matter would require to be inserted in explanation of motives which were wholly personal and therefore to be omitted from the book."