Definify.com
Webster 1913 Edition
Upswell
Up-swell′
,Verb.
 I.
 To swell or rise up. 
Definition 2025
upswell
upswell
English
Noun
upswell (plural upswells)
-  A rising swell.
-  2007 August 8, Reuters, “Lenovo Shares Soar on Word of Talks to Buy Packard Bell”, in New York Times:
- Lenovo, one of a handful of Chinese companies trying to forge a global brand by investing abroad, dropped to fourth globally in the first three months of 2007, but reclaimed the No. 3 spot from Acer a quarter later by riding an upswell of corporate demand.
 
 
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Verb
upswell (third-person singular simple present upswells, present participle upswelling, simple past upswelled, past participle upswelled or upswollen)
- (intransitive) To swell upward.