sky

n. the area above the earth where clouds, the sun, and the stars appear.

n. the region of the atmosphere and outer space seen from the earth.

“The sky was a beautiful shade of pink as the sun began to set.”

“Heavy grey clouds gathered across the sky, signaling that a severe thunderstorm was likely to break before evening.”

n. the place where people believe God or gods live.

n. the celestial abode of the divine or the souls of the departed.

“In the old story, the hero looked up to the sky to ask the gods for help.”

“The poet frequently invoked the powers of the sky to witness his tragic oath of vengeance.”

Literary · Archaic

n. a technical term for all the paths light can take from a single point.

n. the set of all lightlike directions passing through a specific point in a spacetime manifold.

“The scientist explained how light moves through the sky in his physics lecture.”

“In general relativity, the sky of an observer at a given event is represented by the celestial sphere of lightlike directions.”

Technical