upgrade-n; 4 Senses

Sense Number 1: an upward slope

Commentary: UPGRADE[+form][+slope][+upward]

The upgrade was too steep for the old locomotive.
What is the upgrade of this stretch of mountain road?

WordNet 3.0 Sense Numbers: 1, 4

Sense Number 2: improved version of a product

Commentary: UPGRADE[+artifact][+product][+version][+improved]

You can download the upgrade to that software for free.
The upgrade of that CPU is only $100.
John didn't want to pay for upgrades on his new car.

WordNet 3.0 Sense Numbers: 2, 5

Sense Number 3: an improvement in a reservation

Commentary: UPGRADE[+state][+contract][+reservation][+improved]

Sally was able to get us upgrades to first class on the flight.
For 1000 points the hotel will give you an upgrade to an ocean-view suite.

WordNet 3.0 Sense Numbers: 3

Sense Number 4: the act of improving something's quality

Commentary: UPGRADE[+event][+improvement][+of_quality]

The upgrade of the power plant will enable it to meet emission standards.
The decorator said he could do an upgrade of the restaurant's decor for under $5000.

WordNet 3.0 Sense Numbers: 6