Wiktionary:Word of the day/October 23

1. (uncountable) Uncultivated and unsettled land in its natural state inhabited by wild animals and with vegetation growing wild; (countable) a tract of such land; a waste or wild.
2. (by extension)
   1. (countable) A place other than land (for example, the air or sea) that is uncared for, and therefore devoted to disorder or wildness.
   2. (countable, horticulture) An ornamental part of a garden or park cultivated with trees and often a maze to evoke a natural wilderness.
   3. (uncountable, obsolete) Unrefinedness; wildness.
3. (countable, figuratively)
   1. Chiefly followed by of: a bewildering flock or throng; a large, often jumbled, collection of things.
   2. A place or situation that is bewildering and in which one may get lost.
   3. Often preceded by in the: a situation of disfavour or lack of recognition; (specifically, politics) of a politician, political party, etc.: a situation of being out of office.

Today is World Wilderness Day, which was established by the European Wilderness Society to promote appreciation and protection of wilderness areas.