nothingness

Etymology

From nothing + -ness.

noun

1. The state of nonexistence; the condition of being nothing.
   In 1928 [Martin] Heidegger succeeded [Edmund] Husserl to take a chair at Freiburg and in his inaugural lecture made a pronouncement that earned him a reputation as an archetypal metaphysician with his claim that our awareness of people as a whole depends on our experience of dread in the face of nothingness. 12 April 2014, Michael Inwood, “Martin Heidegger: the philosopher who fell for Hitler [print version: Hitler's philosopher]”, in The Daily Telegraph (Review), London, page R11
2. A void; an emptiness.
3. The quality of inconsequentiality; the lack of significance.