The Banner
Scholars have said that seeing a banner or flag in a dream carries meanings of high status, authority, and guidance. One who sees it may become renowned in his city, it indicates guidance for the perplexed, and a husband for a woman. It also signifies kingship, governance, honor, and security from fears, and may symbolize the birth of a boy for a pregnant woman or marriage for the dreamer. Its interpretations vary by color, indicating joy and happiness, distinction and rain, or war and turmoil.
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.