—n. 1. an incline going up in the direction of movement.
2. an increase or improvement: an upgrade in the year's profit forecast. 3. a new version, improved model, etc.: The company is offering an upgrade of its sports sedan. 4. an increase or improvement in one's service, accommodations, privileges, or the like: If the ship isn't full we'll receive an upgrade to a deluxe stateroom. 5. something, as a piece of equipment, that serves to improve or enhance: a full range of upgrades available for your computer.
—adj. uphill; of, pertaining to, on, or along an upgrade.
—adv. up a slope.
—v.t. 1. to promote to a higher grade or rank: He has been upgraded to senior vice president. 2. to improve or enhance the quality or value of: to upgrade property by landscaping it.
—v.i. to improve the quality, value, effectiveness, or performance of something: Buy this basic computer and upgrade whenever you're ready.