Noun nonentity has 3 senses
  1. nonexistence, nonentity - the state of not existing
    --1 is a kind of nonbeing
    --1 has particulars:
     unreality, irreality; nothingness, void, nullity; impossibility, impossibleness
  2. cipher, cypher, nobody, nonentity - a person of no influence
    --2 is a kind of commoner, common man, common person
    --2 has particulars:
     pip-squeak, squirt, small fry; whippersnapper, jackanapes, lightweight
  3. nothing, nonentity - a nonexistent thing
    --3 is a kind of thing