"upgrade" in the noun sense
1. ascent, acclivity, rise, raise, climb, upgrade
an upward slope or grade (as in a road
"the car couldn't make it up the rise"
2. upgrade
software that provides better performance than an earlier version did
3. upgrade
a reservation that is improved
"I got an upgrade to first class when coach class was full"
4. upgrade, rise, rising slope
the property possessed by a slope or surface that rises
5. upgrade
hardware that provides better performance than an earlier version did
6. upgrade
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"
"upgrade" in the verb sense
1. upgrade
rate higher raise in value or esteem
2. upgrade
to improve what was old or outdated
"I've upgraded my computer so I can run better software"
"The company upgraded their personnel"
3. promote, upgrade, advance, kick upstairs, raise, elevate
give a promotion to or assign to a higher position
"John was kicked upstairs when a replacement was hired"
"Women tend not to advance in the major law firms"
"I got promoted after many years of hard work"
4. upgrade
get better travel conditions
"I upgraded to First Class when Coach Class was overbooked"
5. upgrade
give better travel conditions to
"The airline upgraded me when I arrived late and Coach Class was full"
Source: WordNet® (An amazing lexical database of English)
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