Origin: Greek suffix -ist
Existentialist has 4 different meanings across 2 categories:
a philosopher who emphasizes freedom of choice and personal responsibility but who regards human existence in a hostile universe as unexplainable
A person who adheres to the philosophy of existentialism.
relating to or involving existentialism
"existentialist movement"
"existentialist philosophy"
"the existentialist character of his ideas"
Of or pertaining to existentialism.