To define any phenomena or any concept is very difficult is a very difficult because it is a scientific process. The definition of a social concept is very much objective in nature. There should not be any room for ambiguity or implication in a definition. Giving a definition is not an exception as well. To defining an act as a crime is very difficult task because criminality cannot be imposed on any person by way of implication or on the basis of vague idea. There are many criminologists who have tried to define crime by their own assumption. Every such definition is also criticized by other criminologist as based on vague ideas. In this paper, it is tried to discuss the various definition of crime put forward by the criminologist and also have endeavor to find out a proper definition in a very objective way.
