In the broadest sense a compiler is any program that translates between different representations af a program. In that sense one can also consider a decompiler

In the broadest sense a compiler is any program that translates between different representations af a program. In that sense one can also consider a decompiler as a compiler. Also we usually use the term compilation (or more specifically Ahead Of Time and Just In Time compilation) for when we translate bytecode into machinecode.