副词
及物动词
名词
1. the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)
e.g. the power plant received a new upgrade
2. hardware that provides better performance than an earlier version did
3. the property possessed by a slope or surface that rises
Synonym: riserising slope
4. a reservation that is improved
e.g. I got an upgrade to first class when coach class was full
5. software that provides better performance than an earlier version did
6. an upward slope or grade (as in a road)
e.g. the car couldn't make it up the rise