"expulsion" in the noun sense
1. ejection, exclusion, expulsion, riddance
the act of forcing out someone or something
"the ejection of troublemakers by the police"
"the child's expulsion from school"
2. extrusion, expulsion
squeezing out by applying pressure
"an unexpected extrusion of toothpaste from the bottom of the tube"
"the expulsion of pus from the pimple"
3. expulsion, projection, ejection, forcing out
the act of expelling or projecting or ejecting
Source: WordNet® (An amazing lexical database of English)
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