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

(en noun)

A cutting; a part cut out from the rest of something.

A part, piece, subdivision of anything.

* {{quote-magazine, date=2013-06-28, author=(Joris Luyendijk)

, volume=189, issue=3, page=21, magazine=(The Guardian Weekly) , title= Our banks are out of control , passage=Seeing the British establishment struggle with the financial sector is like watching an alcoholic […].  Until 2008 there was denial over what finance had become. […]  But the scandals kept coming, and so we entered stage three – what therapists call "bargaining". A broad section of the political class now recognises the need for change but remains unable to see the necessity of a fundamental overhaul. Instead it offers fixes and patches.}}

A part of a document.

An act or instance of cutting.

A cross-section (image that shows an object as if cut along a plane).

# (aviation) A cross-section perpendicular the longitudinal axis of an aircraft in flight.

(surgery) An incision or the act of making an incision.

(sciences) A thin slice of material prepared as a specimen for research.

(senseid) A taxonomic rank below the genus (and subgenus if present), but above the species.

An informal taxonomic rank below the order ranks and above the family ranks.

(military) A group of 10-15 soldiers lead by a non-commissioned officer and forming part of a platoon.

(category theory) A right inverse.

(NZ) A piece of residential land usually a quarter of an acre in size; a plot.

(label) A one-mile square area of land, defined by a government survey.