GelsenkirchenPronunciation: /ˈgɛlz(ə)nˌkɪəx(ə)n, ˌgɛlznˈkɪrçn/Definition of Gelsenkirchen an industrial city in western Germany, in North Rhine-Westphalia north-east of Essen; population 266,800 (est. 2006). Gelsenkirchen in other Oxford dictionaries Definition of Gelsenkirchen in the US English dictionary