EXISTENTIALISM: A philosophy that emphasizes the uniqueness and isolation of the individual experience in a hostile or indifferent universe, regards human existence as unexplainable, and stresses freedom of choice and responsibility for the consequences of one's acts.
ABSURD: the quality or condition of existing in a meaningless and irrational world.
ABSURDISM: A philosophy, often translated into art forms, holding that humans exist in a meaningless, irrational universe and that any search for order by them will bring them into direct conflict with this universe