From Longman Dictionary of Contemporary Englishprisoner of conscienceˌprisoner of ˈconscience noun [countable] SCJsomeone who is put in prison because of their political ideas
Examples from the Corpus
prisoner of conscience• Congress, have portrayed her as a prisoner of conscience persecuted for her leftist views.• Recently he was adopted by Amnesty International as a prisoner of conscience.• Amnesty International considers Moncef Triki to be a prisoner of conscience.• Tom Martell sits in the federal penitentiary at Las Vegas, a prisoner of conscience.• In Czechoslovakia former prisoner of conscience Vaclav Havel became President of his country.• He chose to do nothing, and for a time remained in a distant castle as a virtual prisoner of conscience. 