'upgrade' definitions:

Definition of 'upgrade'

From: WordNet
noun
An upward slope or grade (as in a road); "the car couldn't make it up the rise" [syn: ascent, acclivity, rise, raise, climb, upgrade] [ant: declension, declination, decline, declivity, descent, downslope, fall]
noun
Software that provides better performance than an earlier version did
noun
A reservation that is improved; "I got an upgrade to first class when coach class was full"
noun
The property possessed by a slope or surface that rises [syn: upgrade, rise, rising slope]
noun
Hardware that provides better performance than an earlier version did
noun
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 [ant: downgrade]
verb
To improve what was old or outdated; "I've upgraded my computer so I can run better software"; "The company upgraded their personnel"
verb
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" [syn: promote, upgrade, advance, kick upstairs, raise, elevate] [ant: break, bump, demote, kick downstairs, relegate]
verb
Get better travel conditions; "I upgraded to First Class when Coach Class was overbooked"
verb
Give better travel conditions to; "The airline upgraded me when I arrived late and Coach Class was full"

Synonyms of 'upgrade'

From: Moby Thesaurus