penitentiarypenitentiary /ˌpenəˈtenʃəri/ noun (plural penitentiaries) [countable] American Englishすべての翻訳を見るa prison – used especially in the names of prisons刑務所――特に刑務所の名称に用いる: the North Carolina state penitentiaryノースカロライナ州立刑務所► see thesaurus at prison