ex ‧ pul ‧ sion /ɪkˈspʌlʃ ə n/ BrE AmE noun [uncountable and countable]
[ Date: 1400-1500 ; Language: Latin ; Origin: expulsio , from expulsus , past participle of expellere ; ⇨ ↑ expel ]
1 . the act of forcing someone to leave a place ⇨ expel
expulsion of
the expulsion of the protesters
expulsion from
his expulsion from the Soviet Union in 1964
2 . the act of stopping someone from going to the school where they were studying or from being part of the organization where they worked ⇨ expel :
The headmaster threatened the boys with expulsion.
expulsion of
the expulsion from the party of its former leader
3 . the act of forcing air, water, gas etc out of something ⇨ expel