extension definition | Dictionary.com

ex⋅ten⋅sion

[ik-sten-shuh

–noun

1.	an act or instance of extending.

2.	the state of being extended.

3.	that by which something is extended; an addition: a four-room extension to a house.

4.	an additional period of time given one to meet an obligation: My term paper wasn't finished so I asked for an extension.

5.	something that can be extended; an extended object: a table with drop-leaf extensions.

6.	range of extending; degree of extensiveness; extent: the extension of our knowledge.

7.	an additional telephone that operates on the principal line.

8.	Commerce. a written engagement on the part of a creditor, allowing a debtor further time to pay a debt.

9.	Physics. that property of a body by which it occupies space.

10.

Anatomy.

a.	the act of straightening a limb.

b.	the position that a limb assumes when it is straightened.

11.	Surgery. the act of pulling the broken or dislocated part of a limb in a direction from the trunk, in order to bring the ends of the bone into their natural situation.

12.	Also called extent. Logic. the class of things to which a term is applicable, as “the class of such beings as Plato and Alexander” to which the term “man” is applicable. Compare intension (def. 5).

13.	Mathematics. a function having a domain that includes the domain of a given function and that has the same value as the given function at each point in the domain of the given function.

14.	Also called file extension. Computers. one or more characters at the end of a filename, usually following a period, used to indicate the type of file.

15.	Manège. the act of bringing or coming into an extended attitude.

–adjective

16.	of or pertaining to extension courses.

Origin:
1350–1400; ME < L extēnsiōn- (s. of extēnsiō). See extensive, -ion

Related forms:

ex⋅ten⋅sion⋅al⋅i⋅ty, ex⋅ten⋅sion⋅al⋅ism, noun

ex⋅ten⋅sion⋅al, adjective

ex⋅ten⋅sion⋅al⋅ly, adverb

ex⋅ten⋅sion⋅less, adjective

Synonyms:
1. stretching, expansion, enlargement, increase, dilation. 3. lengthening, protraction, continuation. 4. delay. 6. limit.

Antonyms:
1. contraction.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ex·ten·sion (ĭk-stěn'shən)

The act of extending or the condition of being extended.
The amount, degree, or range to which something extends or can extend: The wire has an extension of 50 feet.
1. The act of straightening or extending a limb.
2. The position assumed by an extended limb.
3. 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.
4. An additional telephone connected to a main line.
5. An allowance of extra time, as for the repayment of a debt.
6. The period of this extra time: three months' extension on the loan.
Medicine The application of traction to a fractured or dislocated limb to restore the normal position.
1. 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.
2. An additional telephone connected to a main line.
3. An allowance of extra time, as for the repayment of a debt.
4. The period of this extra time: three months' extension on the loan.
1. An allowance of extra time, as for the repayment of a debt.
2. The period of this extra time: three months' extension on the loan.
The property of an object by which it occupies space.
A program in a university, college, or school that offers instruction, as by television or correspondence, to persons unable to attend at the usual time or in the usual place.
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.
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: In most operating systems, file names having the extension .EXE are executable files.

[Middle English extensioun, from Old French extension, from Latin extēnsiō, extēnsiōn-, from extēnsus, past participle of extendere, to extend; see extend.]
ex·ten'sion·al adj.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Extension

Ex*ten"sion\, n. [L. extensio: cf. F. extension. See Extend, v. t.]

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

2. (Physics) That property of a body by which it occupies a portion of space.

3. (Logic & Metaph.) Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension.

The law is that the intension of our knowledge is in the inverse ratio of its extension. --Sir W. Hamilton.

The extension of [the term] plant is greater than that of geranium, because it includes more objects. --Abp. Thomson.

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

5. (Physiol.) The straightening of a limb, in distinction from flexion.

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

Counter extension. (Surg.) See under Counter.

Extension table, a table so constructed as to be readily extended or contracted in length.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : extension

Spanish: extensión, ampliación,

German: der Anbau, die Verlängerung,

Japanese: 拡張部分

More Translations »

Main Entry: ex·ten·sion
Function: noun
: an increase in length of time; specifically : an increase in the time allowed under an agreement

Main Entry: ex·ten·sion
Pronunciation: ik-'sten-ch&n
Function: noun
1 : the stretching of a fractured or dislocated limb so as torestore it to its natural position
2 : an unbending movement around a joint in a limb (as the knee or elbow) that increases the angle between the bones of the limb at the joint—compare FLEXION 1

extension ex·ten·sion (ĭk-stěn'shən)
n.
Abbr. ext.

The act of straightening or extending a flexed limb.
A pulling or dragging force exerted on a limb in a distal direction.

extension (ĭk-stěn'shən) Pronunciation Key

Mathematics A set that includes a given and similar set as a subset.
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.

extension
1. filename extension.
2. A feature or piece of code which extends a program's functionality, e.g. a plug-in.
(1997-06-21)

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