Meaning : Not made more desirable or valuable or profitable. Especially not made ready for use or marketing.
Example :
Taxes on unimproved land are low.
Unimproved dirt roads.
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.Meaning : (of land) not cleared of trees and brush. In the wild or natural state.
Example :
A farm with 50 acres of unimproved and 68 acres of improved land.
Unimproved woodlands.