Containment
Firstfloor. Without getting into the semantics, I agree that the Wikepedia definition is more precise, however Wikepedia is a public forum which may be edited by the public and therefore not an authoritative source. You expressed concern about the use of the word "uncontained". As a general expression, an uncontained failure is one where a rotating member is able to penetrate the engine casing and be radiated outward from the engine assembly potentially causing further damage or injury. Engine manufacturers are indeed required to, as far as is possible, design engine casings to prevent such penetrations, which they usually do in the case of blade shedding. Disc failure is another matter and will often result in penetration. As I said, QF32 has clearly suffered an uncontained failure and the use of the term in this case is wholly justified in my opinion.