1. the council of the Western Church in 1245 that excommunicated Holy Roman Emperor Frederick II and planned a new crusade against the Holy Land • Syn: First Council of Lyons • Hypernyms: council 2. a city in east-central France on the Rhone River; a principal producer of silk and rayon • Syn: Lyon • Instance Hypernyms: city, metropolis, urban center • Part Holonyms: France, French Republic, Lyonnais 3. the council in 1274 that effected a temporary reunion of the Greek Orthodox with the Roman Catholic Church • Syn: Second Council of Lyons • Hypernyms: council