solipsistic

/ˌsɑlɪpˈsɪstɪk/
adjective
  1. Believing that only one's own mind or self exists, or being extremely self-centered and unable to see things from others' perspectives.
    • His solipsistic attitude made it impossible for him to understand why his friends were upset.
    • In online debates, a solipsistic person often ignores evidence that contradicts their own beliefs.
    • The novel's narrator has a solipsistic view of the world, treating other characters as mere shadows.
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