1. The atmosphere above a given point, especially as visible from the ground during the day.
   That year, a meteor fell from the sky.

2. The part of the sky which can be seen from a specific place or at a specific time; its condition, climate etc.
   I lay back under a warm Texas sky.

3. Heaven.
   This mortal has incurred the wrath of the skies.

4. (theoretical physics) The set of all lightlike lines (or directions) passing through a given point in space-time.
   

5. In an art gallery, the upper rows of pictures that cannot easily be seen.
   

6. A cloud.
   

Synonyms

• celestial sphere
• firmament
• heaven
• lift