Definition of stem verb from the Oxford Advanced American Dictionary

 

stem

 verb
verb
NAmE//stɛm//
 
stem somethingVerb Forms present simple I / you / we / they stem
 
he / she / it stems
 
past simple stemmed
 
-ing form stemming
 
 
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to stop something that is flowing from spreading or increasing The cut was bandaged to stem the bleeding. They discussed ways of stemming the flow of smuggled drugs. The former administration had failed to stem the tide of factory closures. Phrasal Verbsstem from something
See the Oxford Advanced Learner's Dictionary entry: stem