A course of action which has been given the 'stamp of approval' either by the Koran, some other islamic text or an islamic sheihk.
Waleed : " Aaliyah will you marry me?"
Aaliyah: : "I would Waleed, but you already have a wife!"
Waleed : "It is okay my dear. I can take more than one wife. It's totally Allahfied".
Aaliyah : "Awesome! I accept!!"