upgrade

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To raise to a higher grade or standard: upgrading their military defenses.
2. v. To improve the quality of (livestock) by selective breeding for desired characteristics.
3. v. Computer Science To replace (a software program) with a more recently released, enhanced version.
4. v. Computer Science To replace (a hardware device) with one that provides better performance.
5. v. To exchange a possession for one of greater value or quality; trade up.
6. v. Computer Science To replace software or hardware with an upgrade.
7. n. The act or an instance of upgrading.
8. n. Computer Science A software program that provides added enhancements over an earlier version.
9. n. Computer Science A hardware device that provides greater performance than an earlier model.
10. n. An upward incline.
11. adv. Uphill.
12. idiom. on the upgrade Improving or progressing.

Century Dictionary and Cyclopedia

1. In stock-raising, to raise the grade of by the introduction of a higher strain of blood: as, to upgrade a herd.

Wiktionary

1. n. an improved component or replacement item, usually applied to technology
2. v. to improve, usually applied to technology, generally by complete replacement of one or more components
3. v. to replace an existing object with something better
4. v. computing to replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name

WordNet 3.0

1. v. give better travel conditions to
2. v. get better travel conditions
3. v. to improve what was old or outdated
4. n. a reservation that is improved
5. v. rate higher; raise in value or esteem
6. n. the property possessed by a slope or surface that rises
7. v. give a promotion to or assign to a higher position
8. n. hardware that provides better performance than an earlier version did
9. n. the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)
10. n. an upward slope or grade (as in a road)
11. n. software that provides better performance than an earlier version did