To edit out (incorrect, offensive, or otherwise undesirable information) from a book or other publication; to cleanse; to purge.
The publisher decided to expurgate the love scene from the book, to make it more child-friendly.
To undertake editing out incorrect, offensive, or otherwise undesirable information from (a book or other publication); to cleanse; to purge.
The publisher decided to expurgate the book, which meant removing the love scene.
Having had erroneous, obscene, or other objectionable material removed.