D defs.my
Entry 3 senses Webster, 1913

Existential

/ĕgˌ-zĭsˌ-tĕn'-shəl/ · Ex·is·ten·tial · IPA /ˌɛɡzɪˈstɛn(t)ʃəl/
01 a. Having existence.
  1. 1.
    Having existence.[Archaic]
  2. 2.
    of or pertaining to, or having the character of, existentialism.
  3. 3.
    specifying actual existence, rather than only possibility; as, the existential operator.(Logic)
    Existentially as well as essentially intelligent.” — Colerige.