Meaning of SKY in English

[noun] [U] - the area above the tallest structures on the Earth, in which clouds, the sun, etc. can be seenCan you see those birds high up in the sky?The sky is so clear tonight that you can see lots of stars.We looked up into the sky at the sound of the plane.A dark sky is a sign that it's going to rain.There are tall buildings all around our house, so we can't see very much sky.The sky's the limit (= There is no limit) to what you can win in our competition.She was wearing a pretty sky-blue dress (= a dress of the bright blue colour of the sky on a sunny day).The explosion blew the building sky-high (= blew the pieces up into the sky).(figurative) House prices are sky-high (= very high) this year.

Cambridge English vocab.      Кембриджский английский словарь.