nine-thousander

noun2

1. •
   Any mountain that extends more than 9,000 metres (29,528 ft) from the surface.

   • Let’s say that Everest was 200 meters higher, that is, a nine-thousander peak. Would an ascent without additional oxygen still be possible? — 2018
2. •
   Any mountain that extends more than 9,000 feet but less than 10,000 feet above sea level.