
1) Blissful state 2) Euphoric state 3) Exclusively Saxon word 4) Exclusively Anglo word 5) Feeling of elation 6) Heaven 7) High spot for happiness 8) It feels great to be on it 9) Metaphorical state of elation 10) Part of seventh heaven 11) Place for the delirious 12) Place of bliss 13) Realm of rapture in 1958
Found on
https://www.crosswordclues.com/clue/cloud-nine
[tensegrity sphere] Cloud Nine is the name Buckminster Fuller gave to his proposed airborne habitats created from giant geodesic spheres, which might be made to levitate by slightly heating the air inside above the ambient temperature. Geodesic spheres (structures of triangular components arranged to make a sphere) become stronger as they b...
Found on
http://en.wikipedia.org/wiki/Cloud_Nine_(tensegrity_sphere)

a state of perfect happiness (usually in the phrase on cloud nine).
Found on
https://www.infoplease.com/dictionary/cloud-nine
No exact match found.