Martyr, one who voluntarily suffers death rather than deny their religion by words or deeds; such action is afforded special, institutionalized recognition in most major religions of the world. The term may also refer to anyone who sacrifices their life or something of great value for the sake of principle. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.