The region of the atmosphere and outer space seen from the earth. The sky was clear and blue, with not a cloud in sight.
The celestial sphere as seen from the earth. Astronomers study the sky to understand more about the universe.
often the skies: the dwelling place of God, gods, or the spirits of the blessed; heaven. Her soul was believed to ascend to the skies.
The highest attainable level or limit; an upper bound. With enough determination, the sky is the limit.