1868, "upturned part," from up (adv.) + turn (n.). Meaning "improvement" (especially in economics) is from 1930.
uptake
uptick
uptight
up-to-date
uptown
upturn
upward
upwelling
upwind
ur-
uracil
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}