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Definition of Saint joan
1. Noun. French heroine and military leader inspired by religious visions to organize French resistance to the English and to have Charles VII crowned king; she was later tried for heresy and burned at the stake (1412-1431). 
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1. Noun. French heroine and military leader inspired by religious visions to organize French resistance to the English and to have Charles VII crowned king; she was later tried for heresy and burned at the stake (1412-1431).