/ ˌegzɪˈstenʃəl; NAmE / adjective [ only before noun ]
1.
( formal ) connected with human existence
2.
( philosophy ) connected with the theory of existentialism
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WORD ORIGIN
late 17th cent.: from late Latin existentialis , from existentia , from Latin exsistere come into being, from ex- out + sistere take a stand.