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Definition of lessen verb from the Oxford Advanced American Dictionary

  

lessen

 verb
verb
NAmE//ˈlɛsn//
 
[intransitive, transitive]Verb Forms present simple I / you / we / they lessen
 
he / she / it lessens
 
past simple lessened
 
-ing form lessening
 
 
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to become or make something become smaller, weaker, less important, etc. synonym diminish The noise began to lessen. lessen something to lessen the risk/impact/effect of something They gave her an injection to lessen the pain.
lessening
 
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noun [singular, uncountable] a lessening of tensionSee lessen in the Oxford Advanced Learner's Dictionary
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