a state of perfect happiness (usually in the phrase on cloud nine).
by 1950, sometimes also cloud seven (1956, perhaps by confusion with seventh heaven), American English, of uncertain origin or significance. Some connect the phrase with the 1895 International Cloud-Atlas (Hildebrandsson, Riggenbach and Teisserenc de Bort), long the basic source for cloud shapes, in which, of the ten cloud types, cloud No. 9, cumulonimbus, was the biggest, puffiest, most comfortable-looking. Shipley suggests the sense in this and other expressions might be because, “As the largest one-figure integer, nine is sometimes used for emphasis.” The phrase might appear in the 1935 aviation-based play “Ceiling Zero” by Frank Wilbur Wead.
A state of total euphoria: Capriati’s coach knew he had to ”get her off Cloud 9”
on cloud nine
[1950s+; fr the notion of clouds as heavenly locations]
- Cloud over
1. Also, cloud up. 2. Become overcast with clouds, as in It’s clouding over now, so it may rain soon, or It was too hot and sunny, but after a while the sky clouded up and we ventured outside. [ Mid-1700s ] 3. Become opaque, misty, or dim, as in I’m sweating so much that […]
noun 1. a mountain in N central Wyoming: highest peak in the Bighorn Mountains. 13,175 feet (4018 meters).
noun 1. the science of the physical properties and processes of clouds.
noun 1. 4 (def 1). noun 1. a group of moving clouds