Crime is an abstract concept.It can be defined as sth that 
hurts sb,violates social norms.It can be mental as well as 
physical.Crime,in short, means going against reason. 
Irrational behaviour is crime.Read the masterpiece "Crime& 
Punishment"  
 santosh_nclpune@yahoo.co.in

Crime is an act that goes against a law pre-set by the state

an act of DEVIANCE- doesn't break the law but goes against 
social norms set by the people who live there.

crime is the breach of one or more rules or laws for which
some governing authority or force may ultimately prescribe a
punishment.

Crime is an act of wrong doing. It is against the law and 
you can be thoroughly punished for any sort of crime.

crime is a way of earning BLACK money and way of aiyashi.

crime means an offense which is violating criminal law of a
state which is declared to be socially harmful for the
people of the society forbidden by law under pain some
punishment.

we can define crime as an act which is against the law of a particular state.crime is an offence against the society.As state is responsible for maintaining law and order for the smooth functioning of society, so for that state prescribes some rules.Violation of these rules can create havoc in the society .State punishes those who violate these rules .There are wrongs which affect individual only they are considered as civil wrongs,but those wrongs which affect whole society are considered as crime . So crime means----act against the will of the society ,an act which society doesn't want,an act for which punishment is given such as imprisionment,death penalty etc.