v. To edit out rude, incorrect, offensive, useless, or otherwise undesirable information from a book, CD or other publication; to cleanse; to purge.
the GNU version of the Collaborative International Dictionary of English
v. To purify; to clear from anything noxious, offensive, or erroneous; to cleanse; to purge.
The Century Dictionary and Cyclopedia
To purge; cleanse; remove anything obnoxious, offensive, or erroneous from; specifically, to free from what is objectionable on moral or religious grounds: as, to expurgate a book; an expurgated edition of Shakspere.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. edit by omitting or modifying parts considered indelicate
Word Usage
"I would not 'expurgate' school editions of great authors; the frank obscenity of parts of Shakespeare is far less immoral than the prurient prudishness which declines to print it, but numbers the lines in such a way that the boy can go home and look up the omitted passage in a complete edition, with a distinct sense of guilt, which is where the harm comes in. ""