differences between simulator and emulator?

Answer 1

simply:

simulation, which is done by pure software,
emulation, which involves special hardware to facilitate the emulation.


and Dictionary meaning of it is:
emulation
One system is said to emulate another when it performs in exactly the same way, though perhaps not at the same speed. A typical example would be emulation of one computer by (a program running on) another. You might use an emulation as a replacement for a system whereas you would use a simulation if you just wanted to analyse it and make predictions about it.


check out in the link here
http://ed-thelen.org/comp-hist/emulation.html

Answer 2

n simplest terms, the main difference between simulation and emulation is that simulation is done all in software and emulation is done in hardware