existˈent adjective

1. Having being
2. Existing

existential /eks-is-tenˈshəl/ adjective

1. Of or relating to (esp human) existence
2. Of or relating to existentialism

existenˈtialism noun

A term covering a number of related philosophical doctrines denying objective universal values and holding that people, as moral free agents, must create values for themselves through actions and must accept the ultimate responsibility for those actions in the seemingly meaningless universe

existenˈtialist noun and adjective

existenˈtially adverb

existential quantifier noun (logic)

A formal expression indicating that a statement is true for at least one member of the universe of discourse