Entertainment is that which
- diverts you from your mundane routine of life
- keeps you absorbed and hooked, without needing any serious mental involvement
- helps you to relax and unwind
- helps you in some way to return you to your mundane life again, having given you the necessary and useful diversion from boredom for a while
- helps you elevate you somewhere in some way (example: classical music)
- helps you to kindle some creativity in yourself .