What does "upturn" mean?

An upward turn or trend, especially in business activity or profit.

What is a synonym for "upturn"?

Common synonyms include: access, accession, accretion, accrual, accruement, accumulation.

/ˈʌp.tɜːn/ noun, verb

noun, verb ·Common ·High school level

Noun

1
An upward turn or trend, especially in business activity or profit.
"Near-synonyms: increase; improvement"
2
an upward movement or trend as in business activity wordnet

Verb

"This gradual rise is not a sharp upturn."

From Middle English upturnen, equivalent to up- + turn.