This is the 8497th most frequent Chinese word.
sky
The Chinese word for "sky" (天, tiān) refers to the heavens, the atmosphere, or the overarching expanse above the earth.
In this sentence, '天空' refers to the physical sky, specifically describing its quality ('blue').
天空很蓝。
The sky is very blue.
In this sentence, '天空' is used metaphorically to describe the vastness associated with dreams.
梦想就像天空一样广阔。
Dreams are as vast as the sky.
Here, '天空' is the spatial context where the bird is flying, indicating location.