upgrade

give a promotion to or assign to a higher position

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”

to improve what was old or outdated

“I've upgraded my computer so I can run better software”

an upward slope or grade (as in a road)

the property possessed by a slope or surface that rises

a reservation that is improved

“I got an upgrade to first class when coach class was full”

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”

hardware that provides better performance than an earlier version did

rate higher; raise in value or esteem

software that provides better performance than an earlier version did