definition
To improve, usually applied to technology, generally by complete replacement of one or more components
example
When you upgrade your standard of living, you become addicted to that standard of living.
definition
To replace with something better.
example
I had to upgrade my anti-virus software to protect my computer from the newer threats.
definition
To improve the equipment or furnishings of or services rendered to
example
They upgraded him to the latest model.
definition
To improve in condition or status.
example
She upgraded to a more successful husband.
definition
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.