I. Date: 1567 transitive verb to turn up or over, to direct upward, intransitive verb to turn upward, II. noun Date: 1864 an upward turn especially toward better conditions or higher prices
UPTURN
Meaning of UPTURN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012