Definition of Expulsion
A putting or driving out. Ejectment; banishment; a cutting off from the privileges of an institution or society permanently. The act of depriving a member of a corporation, legislative body, assembly, society, commercial organization, etc., of his membership in the same, by a legal vote of the body itself, for breach of duty, improper conduct, or other sufficient cause. Also, in the law of torts and of landlord and tenant, an eviction or forcible putting out. See Deportation; Ejectment; Eviction; Expel; Forcible entry and detainer; Summary (Summary process).
That's the definition of Expulsion in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.