Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy) Expulsion from school in a dream indicates failure in seeking knowledge or abandoning the path of guidance.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) Expulsion indicates removal from a position or separation from a beloved matter.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) Expulsion is interpreted as worry. Whoever sees himself being expelled will be afflicted with worry.