antislavery[an′tī slā′vər ē; -tē-, -ti-]
antislavery definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
antislavery definition by American Heritage Dictionary
Opposed to the practice or institution of slavery.
- anˌti·slavˈer·y noun