WordNet (r) 3.0 (2006):

Lyons
    n 1: a city in east-central France on the Rhone River; a
         principal producer of silk and rayon [syn: Lyon, Lyons]
    2: the council in 1274 that effected a temporary reunion of the
       Greek Orthodox with the Roman Catholic Church [syn: Lyons,
       Second Council of Lyons]
    3: 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: Lyons, First Council of
       Lyons]