MönchengladbachPronunciation: /ˌmʊnʃ(ə)nˈgladbax, ˌmynçnˈglatbax/Definition of Mönchengladbach a city in NW Germany; population 261,000 (est. 2006). It is the site of the NATO headquarters for northern Europe. Mönchengladbach in other Oxford dictionaries Definition of Mönchengladbach in the US English dictionary