an area or region of land that is not cultivated tended, or inhabited and that is often unhospitable as a consequence, being filled with naturally-occurring vegetation and wildlife;
e.g. They will get lost in the wilderness if they go out after dark.
(noun)
a section of a garden that is untended either deliberately or due to being abandoned/neglected and that is therefore overgrown with natural/wild vegetation;
e.g. A snake lives in the wilderness at the far corner of the garden.
(noun)
a situation that is confusing or unfavorable in some way, often in the context of politics;
e.g. The party was in the wilderness before he rose to power and led them out of it.