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быть на седьмом небе stresses
	⇒ быть на седьмом небе от счастья
gen.	be on top of the world; be large for (от чего-либо); jump over the moon (Anglophile); sit on top of the world (Anglophile); be as happy as a sandboy (george serebryakov); be large for something (от чего-либо); be on cloud nine (RainChild); be over the moon (от счастья, по какому-л. поводу); be over the moon about (sth., от счастья, по какому-л. поводу); float on air (от счастья); fly high (от счастья); over the moon (от счастья, по какому-л. поводу); over the moon about (sth., от счастья, по какому-л. поводу)
idiom.	be in seventh heaven (Andrey Truhachev); be sitting on top of the world (Andrey Truhachev); be like a kid in a candy store (VLZ_58); be overjoyed (george serebryakov); tread on air; be on cloud nine (от счастья 322Соло); float on cloud nine (4uzhoj); be in seventh heaven (Since they got married they've been in seventh heaven. Kugelblitz)
Makarov.	walk on air; feel on top of the world; be over the moon; be top of the world
slang	be in orbit (Anglophile); flying high (Mick and John were flying high after they passed exams. == Мик и Джон были на седьмом небе от счастья, когда сдали экзамены.)
быть "на седьмом небе"
gen.	be flying high; be in the clouds; be over the moon about (sth); be up in the clouds; float on air; fly high; flying high; in the clouds; on the top of the world; on top of the world; over the moon about (sth); up in the clouds
slang	float

быть на седьмом небе: 13 phrases in 6 subjects

American usage, not spelling	1
General	1
Idiomatic	5
Makarov	3
Quotes and aphorisms	1
Slang	2