1. The username "admin" stands for "administrator" in English, with the pronunciation as [ədˌmɪnɪˈstreɪtə(r)]. 2. The term administrator, in English, primarily refers to a manager or an administrator, often used to denote a system administrator, that is, a superuser or system manager. 3. The word administration is a synonym, which not only signifies implementation and execution but also refers to government management and administrative institutions. For instance, it can describe business management or the management of a presidency. 4. In the business sector, "administration" can also indicate the management of commerce or business operations. 5. The word administration can be used with the preposition "of" to imply management or control, and with "under" to suggest governance or supervision.