The American Heritage® Dictionary of the English Language, 4th Edition
adj. Associated with or participating in a questionable act or a crime; having complicity: newspapers complicit with the propaganda arm of a dictatorship.
adj. Associated with or participating in an activity, especially one of a questionable nature.
Word Usage
"Human rights lawyers and NGOs have expressed concern that the UK's intelligence agents could remain complicit in torture after consulting ministers, in line with the new guidance."