Extension definition

ĭk-stĕnshən
Frequency:
The amount or degree to which something is or can be extended; range; extent.
noun
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The amount, degree, or range to which something extends or can extend.

The wire has an extension of 50 feet.

noun
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(medicine) The application of traction to a fractured or dislocated limb to restore the normal position.
noun
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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.
noun
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A part that forms a continuation or addition.

An extension to a factory.

noun
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The property of an object by which it occupies space.
noun
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A branch of a university for students who cannot attend the university proper.
noun
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(mathematics) A set that includes a given and similar set as a subset.
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An extra period of time allowed a debtor for making payment.
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A length of natural or synthetic hair added to a person's hair, as by weaving, gluing, or attaching with a comb at the scalp, to create a longer or fuller style.
noun
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Designating a device that can be extended or that extends something else.

Extension ladder, extension cord.

adjective
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(mathematics) A set that includes a given and similar set as a subset.
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(computer science) A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file.
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The act of extending or the condition of being extended.

The extension of the subway into the suburbs.

noun
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An extending or being extended.
noun
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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.

noun
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(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.

noun
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(logic) The class of objects designated by a specific term or concept; denotation.
noun
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The act of straightening or extending a limb.
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The position assumed by an extended limb.
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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.

noun
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An additional telephone connected to a main line.
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An allowance of extra time, as for the repayment of a debt.
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The period of this extra time.

Three months' extension on the loan.

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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.
noun
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A publicly funded program offering such instruction along with information on agriculture, home economics, and business.
noun
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(logic) The class of all particular objects to which a term refers; denotation.
noun
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(physics) That property of a body by which it occupies space.
noun
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An extra telephone connected to the same line as the main telephone.
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Any of the telephones connected to a PBX or other telephone system, each having a number assigned for direct calling; also, the number so assigned.
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The straightening of a flexed limb.
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Traction applied to a fractured or dislocated limb so as to bring it into its normal position.
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The act or an instance of extending either leg at any angle from the body.
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The capability of a dancer to so extend a leg, specif. at a difficult angle for a period of time.
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An amount on an invoice calculated by multiplying quantity by price.
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The calculation of such an amount.
noun
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(medicine) The application of traction to a fractured or dislocated limb to restore the normal position.
noun
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The act of straightening or extending a limb.
noun
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The position assumed by an extended limb.
noun
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The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.
noun
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That property of a body by which it occupies a portion of space (time, e.g. "spatiotemporal extension")
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(semantics) Capacity of a concept or general term to include a greater or smaller number of objects; — correlative of intension.
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(banking, finance) A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
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(medicine) The operation of stretching a broken bone so as to bring the fragments into the same straight line.
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(weightlifting) An exercise in which an arm or leg is straightened against resistance.
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(fencing) A simple offensive action, consisting of extending the weapon arm forward.
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(telecommunications) A numerical code used to specify a specific telephone in a telecommunication network.
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(computing) A file extension.

Files with the .txt extension usually contain text.

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

A browser extension.

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Other Word Forms

Noun

Singular:
extension
Plural:
extensions

Origin of extension

  • Middle English extensioun from Old French extension from Latin extēnsiō extēnsiōn- from extēnsus past participle of extendere to extend extend

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French extension, from Latin extensio

    From Wiktionary