advanced to a more desirable or valuable or excellent state. Opposite of unimproved.

made more desirable or valuable or profitable; especially made ready for use or marketing; "new houses are springing up on an improved tract of land near the river"; "an improved breed"

(of land) made ready for development or agriculture by clearing of trees and brush; "improved farmlands"

A technology or magic that provides an incremental advance over existing technology or magic. For example, a +2 blaster cannon or boots of speed that increase a character's movement by +4.

An item that has been altered or added to at a later date to improve its style.

Term used to indicate a standard cartridge case which has been altered by fireforming to reduce body taper and/or increase shoulder angle. Improved cases have greater powder capacity than the corresponding standard case.

changed for the better; as, her improved behavior.

become or made better in quality; "was proud of his improved grades"; "an improved viewfinder"