The use of acceptance tests in subsequent iterations is also known as regression testing. Acceptance testing is a key feature of test-driven development (TDD). In Scrum: Scrum does not specify testing methods, and testing is not a part of the Scrum framework.
Medical Definition of MALIGNANCY. 1. : the quality or state of being malignant.
malignant tumor in Medicine. malignant tumor n. A tumor that invades surrounding tissues, is usually capable of producing metastases, may recur after attempted removal, and is likely to cause death unless adequately treated.