Depression:
Dictionary definition: a depressed or sunken place or part; an area lower than the surrounding surface.
sadness; gloom; dejection.
My definition: You know of sadness in the world and are super sensitive to it. It washes over you and carries you with its own current. It is an energy that is relentless and refuses to let you break free. 
How to fix it:
Internet: take drugs.
Me: Talk to someone and have a laugh.