A demonstration of the willingness of a party to enter into a bargain, made in such a way that another individual is justified in understanding that his or her assent to the bargain is invited and that such assent will conclude the bargain. The general rule is that it must be reasonable in the circumstances for the recipient to believe that the communication is an offer. The more definite the communication, the more likely it will constitute an offer.

The Islamic legal system derived from the religious precepts of Islam, particularly the Koran and the Hadith. It is an Arabic language term meaning a body of moral and religious law derived from religious prophecy.