not made more desirable or valuable or profitable; especially not made ready for use or marketing
"taxes on unimproved land are low"
"unimproved dirt roads"
(of land) not cleared of trees and brush; in the wild or natural state
"a farm with 50 acres of unimproved and 68 acres of improved land"
"unimproved woodlands"
Not improved
not tilled, built on, or otherwise improved for use.