sky

C1 · Advanced Uncountable noun Religion Literary · Archaic

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

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

日本語:天※

“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.”

C2 · Proficiency Countable noun Science Technical

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.”