Definition of "unbirth"

unbirth

noun
uncountable
1. The absence of birth; failure to be born.
  Quotations
  So, you're like somebody grieving over the unbirth of a gnat when there's thousands, getting burned and blasted and... all sorts of things are happening to them...
  1971, Stanley Eveling, Come and be killed; and, Dear Janet Rosenberg, Dear Mr Kooning
  His death is a kind of unbirth, and the imagery that surrounds it is physical and sexual.
  1993, Frank Northen Magill, Magill's Literary Annual, 1993
  George's wish of unbirth thus joins a whole series that are never realized.
  2008, James Walters, Alternative worlds in Hollywood cinema: resonance between realms
2. A paraphilia in which the individual desires to be drawn back through the vagina into the womb.
  Quotations
  Maybe a bunch of bi incest, [summoning a] muscular, two-cocked demon of some sort, unbirth, and then another demon shows up and mounts the second demon with the female drow in hir belly, and also takes the drow in the same stroke inside her.
  2001, Hyndis Kogler, “FUR:UB #10(last page, overstuffed belly)”, in fur.artwork.erotica (Usenet)
  Me, I like vore and unbirth. But then, I'm strange […]
  2005, Lord Flame Stryke, “Re: Curious”, in alt.fan.dragons (Usenet)