Definition of oust verb from the Oxford Advanced American Dictionary

 

oust

 verb
verb
NAmE//aʊst//
 
Verb Forms present simple I / you / we / they oust
 
he / she / it ousts
 
past simple ousted
 
-ing form ousting
 
 
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to force someone out of a job or position of power, especially in order to take their place oust somebody (as something) He was ousted as chairman. oust somebody (from something) The rebels finally managed to oust the government from power.
See the Oxford Advanced Learner's Dictionary entry: oust