The word "Urasenke" refers either to Soke (the legitimate family of the original house) composed of the head of the school and his family, or to such a legal entity as the foundation Urasenke-Konnichi-an, or the school itself as an organization including its disciples and descendants.
「裏千家」の語は、家元とその家族らで構成される宗家を指すことも、財団法人裏千家今日庵などの法人組織を指すことも、弟子・門下生を含む流派組織を指すこともある。