recluse

Short definition from Wiktionary

Adjective

1. 1
   Sequestered; secluded, isolated.
2. 2
   Hidden, secret.

Noun

1. 1
   A person who lives in self-imposed isolation or seclusion from the world, especially for religious purposes; a hermit.
2. 2
   The place where a recluse dwells; a place of isolation or seclusion.
3. 3
   A brown recluse spider.
4. 4
   See also Thesaurus:recluse

Verb

1. 1
   To shut; to seclude.