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 WordNet 3.0 & Open English WordNet

Mandamus is a judicial remedy in the form of an order from a court to any government, subordinate court, corporation, or public authority, to do some specific act which that body is obliged under law to do, and which is in the nature of public duty, and in certain cases one of a statutory duty. Wikipedia

A legal term Wikipedia Disambiguation

Court order to perform a public duty Wikidata

A common law prerogative writ that compels a court or government officer to perform mandatory or purely ministerial duties correctly. Wiktionary

A writ that compels a government entity to perform mandatory or purely ministerial duties correctly. Wiktionary