enclosure

Short definition from Wiktionary

Noun

1. 1
   Something that is enclosed, i.e. inserted into a letter or similar package.
2. 2
   The act of enclosing, i.e. the insertion or inclusion of an item in a letter or package.
3. 3
   An area, domain, or amount of something partially or entirely enclosed by barriers.
4. 4
   The act of separating and surrounding an area, domain, or amount of something with a barrier.
5. 5
   The act of restricting access to ideas, works of art or technologies using patents or intellectual property laws.
6. 6
   The post-feudal process of subdivision of common lands for individual ownership.
7. 7
   The area of a convent, monastery, etc where access is restricted to community members.