Noun

1. An upward slope or grade (as in a road)
2. Software that provides better performance than an earlier version did
3. A reservation that is improved
4. The property possessed by a slope or surface that rises
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)

Verb

1. Rate higher; raise in value or esteem
2. To improve what was old or outdated
3. Give a promotion to or assign to a higher position
4. Get better travel conditions
5. Give better travel conditions to