upgrade

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Concise Oxford English Dictionary © 2008 Oxford University Press:
upgrade/ʌpˈɡreɪd/
verb raise to a higher standard or rank. noun an act of upgrading or an upgraded version.
– phrases
on the upgrade improving.
– derivatives
upgradeability (also upgradability) noun,
upgradeable (also upgradable) adjective,
upgrader noun.
'upgrade' also found in these Oxford entries:

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