Added 9 October 2026 bonn noun Categories: PlacesUncommon Words noun ! Definition from WordNet 3.1, Princeton University. More about bonn at Wordnik → Where our words come from → A city in western Germany on the Rhine River; was the capital of West Germany between 1949 and 1989. Related Words: berlinparismarrakechmarrakeshgermanybeijinggermanunibonaboncmsbonne Back to today's word