Noun

(en noun)

The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.

That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension")

(semantics) Capacity of a concept or general term to include a greater or smaller number of objects; — correlative of intension.

* {{quote-web

, date = 2011-07-20 , author = Edwin Mares , title = Propositional Functions , site = The Stanford Encyclopedia of Philosophy , url = http://plato.stanford.edu/archives/fall2011/entries/propositional-function , accessdate = 2012-07-15}}

In addition to concepts and conceptual senses, Frege holds that there are extensions of concepts. Frege calls an extension of a concept a ‘course of values’. A course of values is determined by the value that the concept has for each of its arguments. Thus, the course of values for the concept __ is a dog records that its value for the argument Zermela is the True and for Socrates is the False, and so on. If two concepts have the same values for every argument, then their courses of values are the same. Thus, courses of values are extensional.

(banking, finance) A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.

(medicine) The operation of stretching a broken bone so as to bring the fragments into the same straight line.

(weightlifting) An exercise in which an arm or leg is straightened against resistance.

(fencing) A simple offensive action, consisting of extending the weapon arm forward.

(telecommunication) A numerical code used to specify a specific telephone in a telecommunication network.

(computing) A file extension.

Files with the ''.txt'' extension usually contain text.

(computing) An optional software component that adds functionality to an application.

a browser extension

(logic) The set of tuples of values that, used as arguments, satisfy the predicate.

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.