den

Short definition from Wiktionary

Noun

1. 1
   A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment.
2. 2
   A squalid or wretched place; a haunt.
3. 3
   A comfortable room not used for formal entertaining.
4. 4
   Synonym of fort (“structure improvised from furniture, etc. for playing games.”).
5. 5
   A narrow glen; a ravine; a dell.
6. 6
   A group of Cub Scouts of the same age who work on projects together.
7. 7
   Abbreviation of denier (a unit of weight).
8. 8
   Alternative form of dene.

Verb

1. 1
   To ensconce or hide oneself in (or as in) a den.
2. 2
   Of an animal, to use as a den; to take up residence in.

Adverb

1. 1
   Pronunciation spelling of then, representing AAVE, Bermuda English.

Proper noun

1. 1
   Abbreviation of Denver.
2. 2
   A diminutive of the male given name Dennis.