ADJ [usually ADJ n](争论、案件等)容易裁决(或解决)的,一目了然的 If you describe a dispute or a legal case as open-and-shut, you mean that is easily decided or solved because the facts are very clear. (争论、案件等)容易裁决(或解决)的,一目了然的
It's an open and shut case. The hospital is at fault.