In Islamic jurisprudence it refers to fulfilling or completing those duties that one may have missed due to some reason or other.
[1] It can also mean qadee, a court judgement or the art of adjudication.
[2] A qadee is binding and enforceable, unlike a fatwa, which is merely a legal opinion.
Issued by a Qaadee (judge) in response to a specific case and circumstances.
The qaadee may request a fatwa to help determine the legal outcome of a specific case but is not bound to follow it.