Reims Syllabification: (Reims)Pronunciation: /rēmz, raNs/ (also Rheims)Definition of Reims a city in northern France, chief town of the Champagne-Ardennes region; population 188,078 (2006). It was the traditional coronation place for most French kings and is noted for its fine 13th-century Gothic cathedral. Reims in other Oxford dictionaries Definition of Reims in the British & World English dictionary