I. unimproved adjective
Etymology: un- (I) + improved, past participle of improve (to reprove)
obsolete : not subjected to censure : unreproved
II. un·improved |ən+ adjective
Etymology: un- (I) + improved, past participle of improve (to better)
: not improved: as
a. of land : not tilled, built upon, or otherwise improved for use : retained in the wild or natural state
a farm with 50 acres of improved and 68 acres of unimproved land
unimproved woodlands
b. : not used or employed advantageously or for a valuable purpose
opportunity unimproved may become a source of repining
c. : not selectively bred for better quality or productiveness : of the kind occurring in nature or as a result of chance interbreeding ; often : being a scrub
unimproved native cattle yielding little meat and less milk
d. of a road : lacking a hardened surface and usually unsuitable for all year travel