Abstract

In this article, the writer first refers to a definition by Aristotle, a definition by Farabi and five definitions by Ibn-Sina concerning the possible. Then he examines and criticizes Ibn-Sina's five-fold definitions and states the reasons for the superiority of the first definition over the others. In the rest of the paper, he explores the different positions on whether the definitions of the possible are real or simply consist of some descriptions for a word.