an extraordinary writ commanding an official to perform a ministerial act that the law recognizes as an absolute duty and not a matter for the official's discretion; used only when all other judicial remedies fail
例句
用作名词(n.)
It serves no purpose to issue some high-profile mandamus or declaration that can remain only on paper.发出高姿态的训令或宣言，却不能实行是毫无意义。
