(uncountable) Uncultivated and unsettled land in its natural state inhabited by wild animals and with vegetation growing wild; a tract of such land; a waste or wild.
(by extension) A noun "wilderness" represents a place other than land that is uncared for and devoted to disorder or wildness.
(countable, figurative) A noun "wilderness" represents a place or situation that is bewildering and in which one may get lost, often associated with a situation of disfavor or lack of recognition in politics.