Bigamy comprises of two words 'Bi' and 'gamy' which means 'two' and 'marriage'. Altogether it can be defined as entering into a marital relationship while the first marriage still exists. In the present time bigamy is a punishable offence under IPC and under Hindu Law.
In simple words Murder can be defined as killing of a human being by another human being. Under IPC, the concept of murder is dealt in section 299 and 300 which state the definition of culpable homicide and murder respectively.