D defs.my
Entry 3 senses Webster, 1913

Nonentity

/nän-ĕn'-tət-ē/ · Non·en·ti·ty · IPA /nɑnˈɛntətiː/
01 n. Nonexistence; the negation of being.
pl. Nonentities
  1. 1.
    Nonexistence; the negation of being.
  2. 2.
    A thing not existing.
  3. 3.
    A person or thing of little or no account; an unimportant person; -- usually used as a disparaging term.[Colloq.]