Theodore Roosevelt National Park Syllabification: (The·o·dore Roo·se·velt Na·tion·al Park)Pronunciation: /ˈTHēəˌdôr ˈrōzəˌvelt/Entry from US DictionaryDefinition of Theodore Roosevelt National Park a preserve in western North Dakota that incorporates Roosevelt’s ranch home as well as extensive badlands areas. Theodore Roosevelt National Park in other Oxford dictionaries Definition of Theodore Roosevelt National Park in the US English dictionary