وهي أمر يظهر بخلاف العادة على يد مدعي النبوة عند تحدي المنكرين
A miracle is an event contrary to established custom appearing through one who claims prophethood when challenging deniers.
Its principal features are (1) departure from ordinary custom, (2) connection with a prophetic claim, (3) occurrence as confirmation in the relevant setting, and (4) the challengers' inability to reproduce the sign.
Not every rare or astonishing event qualifies as a miracle. To serve as a prophetic miracle, an event must bear an evidential relation to the truth of the prophetic claim.