If you describe something as unsatisfactory, you mean that it is not as good as it should be, and cannot be considered acceptable. The inspectors said just under a third of lessons were unsatisfactory He asked a few more questions, to which he received unsatisfactory answers. = inadequate satisfactory. not good enough or not acceptable
not giving satisfaction; "shops should take back unsatisfactory goods"; "her performance proved to be unsatisfactory"; "life is becoming increasingly unsatifactory"; "our discussion was very unsatisfactory