(idiomatic) An area intermediate between two mutually exclusive states or categories, where the border between the two is fuzzy.

(informal, US, military, aviation, research, espionage, ufology) A secret military facility, an airport, an airbase in Nevada Test and Training Range, Nevada, United States; A military base in Nevada, where advanced military aircraft are developed; foreign military aircraft are evaluated; and rumored to be where the US government hides extra-planetary alien visitors.

(air traffic control) an airspace within which it is dangerous for aircraft to fly.

(cricket) the central, rectangular area of the pitch onto which the bowlers may not run during their follow through

(American spelling) Alternative form of grey area

(US) a rug that only covers part of the floor of a room

(cartography) Of a map, having the property that equal areas on the map represent equal areas on the mapped surface.

Former name of Gilgit-Baltistan.

Used other than figuratively or idiomatically: see area, influence.

(soccer, futsal) An area of a pitch or field, inside which a penalty is given to the offensive team if a foul is made by the defensive team.