From Longman Business Dictionarysecurity ratingseˈcurity ˌrating [countable] COMPUTING a measurement of how well a computer or computer network protects private dataWindows NT has a C2 security rating. → ratingsecurity ratingseˈcurity ˌrating [countable] FINANCE a measurement of the risk of investing in a particular companyAnalysts gave the company a security rating indicating ‘questionable financial security’. → rating
