The Sky
Scholars have said that seeing the sky in a dream may indicate attaining power, leadership, or responsibility, and it can symbolize knowledge, manners, and wisdom. It has also been said that it refers to rain, where its closure implies withholding and its opening implies abundance. It might also signify travel or attempting something that won't be achieved. In another interpretation, it may symbolize an illicit act such as stealing a Quran.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.