Noun

(en noun)

A person with extensive knowledge or ability in a given subject.

* If an expert''' says it can't be done, get another '''expert . -

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= Welcome to the plastisphere , passage=Plastics are energy-rich substances, which is why many of them burn so readily. Any organism that could unlock and use that energy would do well in the Anthropocene. Terrestrial bacteria and fungi which can manage this trick are already familiar to experts in the field.}}

(chess) A player ranking just below master.

Noun

(senseid)(uncountable) The condition of being exposed, uncovered, or unprotected.

* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=55, magazine=(The Economist)

, title= Obama goes troll-hunting , passage=The solitary, lumbering trolls of Scandinavian mythology would sometimes be turned to stone by exposure to sunlight. Barack Obama is hoping that several measures announced on June 4th will have a similarly paralysing effect on their modern incarnation, the patent troll.}}

(countable, uncountable) That part which is facing or exposed to something, e.g. the sun, weather, sky, or a view.

(uncountable) Lack of protection from weather or the elements.

* 1993 , (Paul Chadwick), The Ugly Boy , Dark Horse Books

As all of you know, a great tragedy occurred yesterday. Arthur Harcourt died of exposure sometimes in the morning in the woods off Mount Tom Road.

(senseid)(photography) An instance of taking a photograph.

(photography) The piece of film exposed to light.

(photography) Details of the time and f-number used.

(gardening) The amount of sun, wind etc. experienced by a particular site.