Fatwa
From Islamic Finance WIKI
Fatwa has been translated by many as an 'opinion' but its correct definition in conformity with the Arabic language is; 'Directive', 'Instruction' or 'Giving guidance by advice.'
In the Quran, Allah says, "They ask thee for a legal decision. Say: God directs (thus) about those who leave no descendants as ascendants as heirs..." (Quran 4:176)
Sheikh Jafar Subhani comments on this verse by saying, "Fatwa means to give an answer to a question that has been asked." (Book: تاريخ الفقه الاسلامي)
In Shari'ah, a fatwa is the guidance and instruction given by a Scholar (often called Mufti) who use the principles of Islamic jurisprudence in order to derive rulings from various sources (Quran, Hadith etc).