adj not tilled, cultivated, or built upon; yielding no revenue; as, unimproved land or soil.
2. unimproved ·adj not improved; not made better or wiser; not advanced in knowledge, manners, or excellence.
3. unimproved ·adj not used; not employed; especially, not used or employed for a valuable purpose; as, unimproved opportunities; unimproved blessings.