This is the 1831st most frequent Russian word.
небо
Sky; heaven.
Used metaphorically to describe limitless potential or ambition.
В его мечтах небо было пределом.
In his dreams, the sky was the limit.
Contextualized in the act of watching above towards the natural world.
Он смотрел в небо и думал о звёздах.
He looked at the sky and thought about the stars.
Describes the physical appearance of the sky.