From Longman Business Dictionarymission-criticalˈmission-ˌcritical adjectiveCOMPUTINGHUMAN RESOURCES mission-critical computer software and NETWORKs (=system of connected computers) are extremely important, allowing a business to be able to operateWithout mission-critical networks, virtually every aspect of the company’s international trade and commerce grinds to a halt.
