Definition of upswell noun from the Oxford Advanced American Dictionary

 

upswell

 noun
noun
NAmE//ˈʌpswɛl//
 
(also upswelling
NAmE//ˈʌpˌswɛlɪŋ//
 
)
[singular]upswell of something(formal)
 
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an increase in something, especially a feeling a huge upswell of emotion
See the Oxford Advanced Learner's Dictionary entry: upswell