Definition of John
- (1165–1216), son of Henry II, king of England 1199–1216; known as John Lackland. He lost most of his French possessions, including Normandy, to Phillip II of France. In 1209 he was excommunicated for refusing to accept Stephen Langton as Archbishop of Canterbury. Forced to sign Magna Carta by his barons (1215), he ignored its provisions and civil war broke out.