Dictionary definition · upgrade
noun
- an upward slope or grade (as in a road)"the car couldn't make it up the rise"
- software that provides better performance than an earlier version did
- a reservation that is improved"I got an upgrade to first class when coach class was full"
- the property possessed by a slope or surface that rises
- hardware that provides better performance than an earlier version did
- the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)"the power plant received a new upgrade"
verb
- rate higher; raise in value or esteem
- to improve what was old or outdated"I've upgraded my computer so I can run better software"
- give a promotion to or assign to a higher position"John was kicked upstairs when a replacement was hired"
- get better travel conditions"I upgraded to First Class when Coach Class was overbooked"
- give better travel conditions to"The airline upgraded me when I arrived late and Coach Class was full"
Source: Open English WordNet (CC BY 4.0).