A more thorough explanation:

Definition: A dispossessor is someone who takes away someone else's property or possessions.

Example: When the landlord evicted the tenants without proper notice, he became the dispossessor of their apartment.

Explanation: In this example, the landlord took away the tenants' right to live in the apartment by evicting them without proper notice. The landlord became the dispossessor because he took away the tenants' possession of the apartment.

Example: The colonizers were the dispossessors of the indigenous people's land.

Explanation: In this example, the colonizers took away the indigenous people's land and became the dispossessors. The indigenous people were no longer in possession of their own land.