definition of
expulsion

[1] #1 expulsion n. [ejection, exclusion, riddance] the act of forcing out someone or something; "the ejection of troublemakers by the police"; "the child's expulsion from school". wn

[2] #2 expulsion n. [extrusion] squeezing out by applying pressure; "an unexpected extrusion of toothpaste from the bottom of the tube"; "the expulsion of pus from the pimple". wn

[3] #3 expulsion n. [projection, ejection, forcing out] the act of expelling or projecting or ejecting. wn