olemus
süsteemi, riistvara, püsivara või tarkvara
asendamine uuema versiooniga või täiendamine selleni

Wiktionary:
upgrade, verb
1. (transitive) to improve, usually applied to technology, generally by complete replacement of one or more components
When you upgrade your standard of living, you become addicted to that standard of living.
2. (transitive) to replace with something better
I had to upgrade my anti-virus software to protect my computer from the newer threats.
3. (transitive) to improve the equipment or furnishings of or services rendered to
They upgraded him to the latest model.
They were upgraded to first class.
5. (intransitive, computing) to replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name

ülevaateid
https://en.wikipedia.org/wiki/Upgrade

vt ka
- ajakohastamine
- dünaamiline uuendamine
- uuend
- värskendamine