protected area

Short definition from Wiktionary

Noun

1. 1
   the central, rectangular area of the pitch onto which the bowlers may not run during their follow through
2. 2
   an area where natural values are protected. The most common definitions of protected areas are those of the IUCN (World Conservation Union) http://www.iucn.org.
3. 3
   Used other than figuratively or idiomatically: see protected, area.