Source: The Great Interpretation of Dreams (Ibn Sirin)
Seeing Adam (AS) in a dream indicates committing a sin then repenting from it, or gaining a position, or Hajj, or meeting loved ones.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Seeing Adam indicates honoring parents or long life. Whoever speaks to him will gain knowledge.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Seeing Adam is interpreted as goodness and blessing. Whoever sees him will attain goodness and exaltation.