extension

[ ik-sten-shuhn ]

/ ɪkˈstɛn ʃən /

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See synonyms for: extension / extensions / extensional on Thesaurus.com

noun

an act or instance of extending, lengthening, stretching out, or enlarging the scope of something.

the state of being extended, lengthened, or stretched out.

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

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

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

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

an additional telephone that operates on the principal line.

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

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

Anatomy.

the act of straightening a limb.
the position that a limb assumes when it is straightened.

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.

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).

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.

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.

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

adjective

of or relating to extension courses.

OTHER WORDS FOR extension

1 stretching, expansion, enlargement, increase, dilation.

3 lengthening, protraction, continuation.

4 delay.

6 limit.

See synonyms for extension on Thesaurus.com

OPPOSITES FOR extension

1 contraction.

See antonyms for extension on Thesaurus.com

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of extension

1350–1400; Middle English <Latin extēnsiōn- (stem of extēnsiō). See extensive, -ion

OTHER WORDS FROM extension

ex·ten·sion·al·i·ty, ex·ten·sion·al·ism, nounex·ten·sion·al, adjectiveex·ten·sion·al·ly, adverbex·ten·sion·less, adjective

non·ex·ten·sion, nounnon·ex·ten·sion·al, adjectivepro·ex·ten·sion, adjectivesu·per·ex·ten·sion, noun

Words nearby extension

extended term insurance, extender, extensible, extensile, extensimeter, extension, extension agent, extensional, extensionality, extension bolt, extension cord

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use extension in a sentence

After all, your fellow employees are an extension of your brand.
Five content promotion strategies SaaS marketers should implement today|Izabelle Hundrev|August 28, 2020|Search Engine Watch
If you haven’t already done so, you can let your elected officials know just how important a PSP extension is to you, your families and our economic recovery.
American Airlines announces plan to cut 19,000 jobs—unless Congress extends pandemic aid|Maria Aspan|August 25, 2020|Fortune
So the ads will be relevant to the web environment you’re currently consuming and consumers will feel more comfortable to convert, as they will see the ads as an extension of the content they are already looking at.
Five great display and video advertising tactics to increase relevance and revenue in a cookie-less world|Anastasia-Yvoni Spiliopoulou|August 24, 2020|Search Engine Watch
Treat your LinkedIn company page as an extension to your website.
What will make your brand stand out on LinkedIn in 2020?|Harikrishna Kundariya|August 12, 2020|Search Engine Watch

None of the reporters and lawyers looking closely at the deal have presented evidence to show Shapery, and by extension Manchester, intentionally misled the city.
How the City Came to Lease a Lemon|Lisa Halverstadt and Jesse Marx|August 10, 2020|Voice of San Diego
Self-marriage is the ultimate brand extension of a self-obsessed, selfish populus.
Why Singles Should Say ‘I Don’t’ to The Self-Marriage Movement|Tim Teeman|December 30, 2014|DAILY BEAST
Last year, it let an unemployment extension for the long-term jobless expire during the holidays.
To GOP Congress, as Usual, It’s Welfare on the Chopping Block|Monica Potts|December 25, 2014|DAILY BEAST
But only for the family; inmates cannot be awarded more than $10,000 because of an extension of the Son of Sam Law.
A Million Ways to Die in Prison|Daniel Genis|December 8, 2014|DAILY BEAST
It is also, by extension, a show about the cultural impact of religion.
The Good Wife’s Religion Politics: Voters Have No Faith in Alicia's Atheism|Regina Lizik|November 24, 2014|DAILY BEAST
What he meant was that he personally, and by extension all Christians, should not be judgmental.
Is Pope Francis Backpedaling on Gays?|Jay Michaelson|November 19, 2014|DAILY BEAST
And now let me come to the second problem we opened up in connection with college education—the problem of its extension.
The Salvaging Of Civilisation|H. G. (Herbert George) Wells
It was the well-known extension en seconde; a favourite trick among Parisian swordsmen of the Romantic school.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
And it may safely be said that with its improvement, has arisen also the extension and wide spread practice of music generally.
Violins and Violin Makers|Joseph Pearce
An octave coupler without such extension is incomplete and is no more honest than a stop which only goes down to Tenor C.
The Recent Revolution in Organ Building|George Laing Miller
No Briton rejoiced more sincerely than this provincial American in the extension of the Empire.
The Eve of the Revolution|Carl Becker

British Dictionary definitions for extension

extension

/ (ɪkˈstɛnʃən) /

noun

the act of extending or the condition of being extended

something that can be extended or that extends another object

the length, range, etc, over which something is extended; extent

an additional telephone set connected to the same telephone line as another set or other sets

a room or rooms added to an existing building

a delay, esp one agreed by all parties, in the date originally set for payment of a debt or completion of a contract

the property of matter by which it occupies space; size

the act of straightening or extending an arm or leg
its position after being straightened or extended

med a steady pull applied to a fractured or dislocated arm or leg to restore it to its normal positionSee also traction (def. 3)

a service by which some of the facilities of an educational establishment, library, etc, are offered to outsiders
(as modifier)a university extension course

logic

the class of entities to which a given word correctly applies: thus, the extension of satellite of Mars is the set containing only Deimos and PhobosCompare intension (def. 1a)
conservative extension a formal theory that includes among its theorems all the theorems of a given theory

Word Origin for extension

C14: from Late Latin extensiō a stretching out; see extend

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for extension

extension

[ ĭk-stĕn′shən ]

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

OTHER WORDS FOR extension

OPPOSITES FOR extension

Origin of extension

OTHER WORDS FROM extension

Words nearby extension

Words related to extension

How to use extension in a sentence

British Dictionary definitions for extension

Word Origin for extension

Scientific definitions for extension