Lyons (Noun) — The council in 1274 that effected a temporary reunion of the Greek Orthodox with the Roman Catholic Church.
Lyons (Noun) — A city in east-central France on the Rhone River; a principal producer of silk and rayon.
Lyons (Noun) — The council of the Western Church in 1245 that excommunicated Holy Roman Emperor Frederick II and planned a new crusade against the Holy Land.