- The definition of an extension is an addition such as to a building, an extra phone line connected to the main line or an extra amount of time given to someone to pay a debt.
- An example of an extension is adding a second story to a single story house.
- An example of an extension is line two on a business line.
- An example of an extension is someone getting an extra fifteen days to pay their electric bill.
- an extending or being extended
- the amount or degree to which something is or can be extended; range; extent
- a part that forms a continuation or addition: an extension to a factory
- an extra period of time allowed a debtor for making payment
- a branch of a university for students who cannot attend the university proper
- an extra telephone connected to the same line as the main telephone
- the straightening of a flexed limb
- traction applied to a fractured or dislocated limb so as to bring it into its normal position
- the act or an instance of extending either leg at any angle from the body
- the capability of a dancer to so extend a leg, specif. at a difficult angle for a period of time
- an amount on an invoice calculated by multiplying quantity by price
- the calculation of such an amount
- Logic the class of all particular objects to which a term refers; denotation
- Physics that property of a body by which it occupies space
Origin of extensionMiddle English extensioun ; from Classical Latin extensio ; from past participle of extendere: see extend
- The act of extending or the condition of being extended: the extension of the subway into the suburbs.
- The amount, degree, or range to which something extends or can extend: The wire has an extension of 50 feet.
- a. The act of straightening or extending a limb.b. The position assumed by an extended limb.
- A length of human or synthetic hair attached to the scalp or to strands of hair close to the scalp to add volume, length, or color.
- Medicine The application of traction to a fractured or dislocated limb to restore the normal position.
- a. An addition that increases the area, influence, operation, or contents of something: an extension for the vacuum cleaner; built a new extension onto the hospital wing.b. An additional telephone connected to a main line.
- a. An allowance of extra time, as for the repayment of a debt.b. The period of this extra time: three months' extension on the loan.
- The property of an object by which it occupies space.
- a. A program in a university, college, or school offering academic instruction to nontraditional students, such as working adults, who cannot attend classes at the usual place and time.b. A publicly funded program offering such instruction along with information on agriculture, home economics, and business.
- Computers A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file: In most operating systems, filenames having the extension .EXE are executable files.
- Logic The class of objects designated by a specific term or concept; denotation.
- Mathematics A set that includes a given and similar set as a subset.
Origin of extensionMiddle English extensioun, from Old French extension, from Latin extēnsiō, extēnsiōn-, from extēnsus, past participle of extendere, to extend; see extend.
- 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 (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.
- (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.
- (telecommunications) 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
From Old French extension, from Latin extensio
extension - Computer Definition
(1) See domain extension.
(2) A software add-on. For example, extensions add functionality to Firefox and Chrome Web browsers.
(3) Prior to Mac OS X, an executable module that enhanced the Mac operating system. The Windows counterpart is a "dynamic link library" (see DLL).
(4) Enhancements to Apple's iOS 8 and OS X Version 10.10 that enable apps to share functions in other apps. See "iOS 8" in iOS versions.
(5) A file type that is appended to the end of a file name. All executable programs in the Windows and Mac worlds use extensions: .EXE in Windows; .APP in Mac (see APP file). In the Unix/Linux environment, executables do not use an extension. No matter which environment, data files have extensions; for example, a file with a .DOC or .DOCX extension is a Microsoft Word document. A file with a .JPG extension is a JPEG image. Prior to Windows 95, extensions were limited to three characters. Starting with Windows 95, they can be very large (254-260 characters depending on Windows version); however, they are kept small in practice. Common Extensions and Exhaustive Lists In this encyclopedia, more than 500 common file extensions are listed under the terms "extension," followed by their first letter such as extension a, extension b and extension c. However, there are Web sites that catalog many more, including the most obscure; for example, visit www.filext.com. See Win Show file extensions, dangerous extensions and graphics formats. See also domain extension.