atriumnounmasculine/ˈa.tɾi.u/mediuma·trioPortuguesEnglishEspanolFrancaisDefinitionAn open or covered space, typically at the entrance of a building, serving as a vestibule.The atrium of the hotel is very spacious.We entered through the main atrium.synlobbyentranceCommon collocationsatrium entrancecentral atriumEtymologyDo latim 'atrium'Related wordsatriumatriumático