Optimist

[ˈɒptɪmɪst] or ['ɑptɪmɪst]

(noun.) a person disposed to take a favorable view of things.

Editor: Stu--From WordNet

(n.) One who holds the opinion that all events are ordered for the best.

(n.) One who looks on the bright side of things, or takes hopeful views; -- opposed to pessimist.

Editor: Ricky

n. A proponent of the doctrine that black is white.

Typist: Vilma