/ ɪkˈspʌlʃn; NAmE / noun expulsion (from ... )
1.
[ U , C ] the act of forcing sb to leave a place; the act of expelling sb :
These events led to the expulsion of senior diplomats from the country.
2.
[ U , C ] the act of sending sb away from a school or an organization, so that they can no longer belong to it; the act of expelling sb :
The headteacher threatened the three girls with expulsion.
The club faces expulsion from the football league.
3.
[ U ] ( formal ) the act of sending or driving a substance out of your body or a container
••
WORD ORIGIN
late Middle English : from Latin expulsio(n-) , from expellere drive out, from ex- out + pellere to drive.