The present work is concerned with chaotic iterated function systems, in more general case. In this regard, we consider a finite set of relations as the generators of our system. Then we study the behavior of some Kuratowski lower closed limit sets associated to every point of the phase space. In light of our observation, we propose a modified notation of chaos (in the sense of Devaney). In fact, this alteration is compatible with the original one. Also, it is shown that any chaotic IFS generated by relations is sensitive. Furthermore, we establish that the IFS generated by inverse relations of a chaotic IFS is either minimal or chaotic.
