to improve the quality or usefulness of something, or change it for something newer or of a better standard
It's very simple to upgrade the indexing software.
Consider upgrading your buildings insurance policy every five to 10 years.
The decision to upgrade the computer's hardware significantly improved its processing speed.
Airlines often offer passengers the option to upgrade to business class for added comfort.
The decision to upgrade the infrastructure was a strategic investment in the city's development.
Regular training helps employees upgrade their skills and stay competitive in the job market.
