noun / verb
sky
SKY/skaɪ/
The visible expanse overhead.
A few clouds and the first stars dot the evening sky.

Etymology
The Old Norse word meant “cloud”; English broadened this to the whole region overhead, rather than just the clouds within it. The plural “skies” originally meant “clouds.”
In context
Without clouds, about 6,000 stars are visible in the night sky, from anywhere on Earth.
More examples
- Clear skies make this a good night for stargazing.
- Dark clouds spread across the sky before the storm.
- The batter skies the ball into shallow center field.
Forms
sky · skies · skied · skyed · skying
skyward adverb — Toward the sky or upper air.