Slander dream meaning is explained below using 4 different sources. Each interpretation is shown with its source.

Interpretation 1 — Martha Clarke

Being slandered in dreams alerts that, in real life, people very close to you might betray you. On the other hand, to slander others evidence a thoughtless action that will bring you serious trouble.
Source: The Big Dictionary of Dreams Author: Martha Clarke

Interpretation 2 — Gustavus Hindman Miller

To dream that you are slandered, is a sign of your untruthful dealings with ignorance.

If you slander any one, you will feel the loss of friends through selfishness.

Source: Ten Thousand Dream Interpretation Author: Gustavus Hindman Miller

Interpretation 3 — Margaret Hamilton

Revealed in order to lessen or avert the defamation
Source: Dream Dictionary Unlimited Author: Margaret Hamilton

Interpretation 4 — Ibn Seerin

(Calumniation, Fire, Harsh words, Rebuke)
Source: Islamic Dream Interpretation Author: Ibn Seerin