Meaning of tiān:
tiān
天
Noun
day; sky; heaven
Jīntiān de tiānqì hěn hǎo.
今天的天气很好。
Today's weather is very good.
Jīntiān de tiānkōng fēicháng qínglǎng.
今天的天空非常晴朗。
The sky is very clear today.
Jīn tiān de tiān kōng tè bié lán.
今天的天空特别蓝。
The sky is especially blue today.