Origin of upgrade

An Americanism dating back to 1870–75; up- + grade
Related formsup·grad·a·ble, up·grade·a·ble, adjectiveup·grad·a·bil·i·ty, up·grade·a·bil·i·ty, nounup·grad·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for upgradeable

upgrade

verb (ʌpˈɡreɪd) (tr)

to assign or promote (a person or job) to a higher professional rank or position
to raise in value, importance, esteem, etc
to improve (a breed of livestock) by crossing with a better strain

noun (ˈʌpˌɡreɪd)

US and Canadian an upward slope
on the upgrade improving or progressing, as in importance, status, health, etc

adjective

US and Canadian going or sloping upwards

adverb (ˈʌpˈɡreɪd)

US and Canadian up an incline, hill, or slope
Derived Formsupgrader, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for upgradeable

upgrade

n.

1873, "upward slope," from up + grade. The meaning "upgraded version" is recorded from 1980; the verb in this sense is attested from 1920 (implied in upgrading).

Online Etymology Dictionary, © 2010 Douglas Harper