existentialist - definition and synonyms

noun [countable] 

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/ˌeɡzɪˈstenʃ(ə)lˌɪst/
singularexistentialist
pluralexistentialists
  1. someone who believes that humans create their own moral values and are responsible for the results of their own actions

    existentialist philosophers

derived word

existentialism

noun [uncountable]