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WordNet (r) 3.0 (2006) (WordNet)

upgrade
n 1: an upward slope or grade (as in a road); "the car couldn't
make it up the rise" [synonym: {ascent}, {acclivity}, {rise},
{raise}, {climb}, {upgrade}] [ant: {declension},
{declination}, {decline}, {declivity}, {descent},
{downslope}, {fall}]
2: software that provides better performance than an earlier
version did
3: a reservation that is improved; "I got an upgrade to first
class when coach class was full"
4: the property possessed by a slope or surface that rises [synonym:
{upgrade}, {rise}, {rising slope}]
5: hardware that provides better performance than an earlier
version did
6: 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"
v 1: rate higher; raise in value or esteem [ant: {downgrade}]
2: to improve what was old or outdated; "I've upgraded my
computer so I can run better software"; "The company upgraded
their personnel"
3: 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" [synonym: {promote}, {upgrade},
{advance}, {kick upstairs}, {raise}, {elevate}] [ant:
{break}, {bump}, {demote}, {kick downstairs}, {relegate}]
4: get better travel conditions; "I upgraded to First Class when
Coach Class was overbooked"
5: give better travel conditions to; "The airline upgraded me
when I arrived late and Coach Class was full"