Pessimism :: Pessimism (n.) The opinion or doctrine that everything in nature is ordered for or tends to the worst, or that the world is wholly evil; -- opposed to optimism..
Pessimism :: Pessimism (n.) A disposition to take the least hopeful view of things.
Pessimist :: Pessimist (n.) One who advocates the doctrine of pessimism; -- opposed to optimist.
Pessimist :: Pessimist (n.) One who looks on the dark side of things.