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1. Dictionary

   ex·ten·sion

   /ikˈsten(t)SH(ə)n/

   noun

   • 1. a part that is added to something to enlarge or prolong it; a continuation: "the railroad's southern extension" Similar additionadd-onadjunctaddendumaugmentationsupplementappendageappendixannexewingsupplementary buildingell
   • ▪ a room or set of rooms added to an existing building: "they hope to demolish the store and build a bar extension" Similar additionadd-onadjunctaddendumaugmentationsupplementappendageappendixannexewingsupplementary buildingell
   • ▪ lengths of real or artificial hair woven into a person's own hair to create a long hairstyle.
   • ▪ the action or process of becoming or making something larger: "the extension of the President's powers" Similar expansionincreaseenlargementwideningbroadeningdeepeningdiversificationheighteningaugmentationenhancementamplificationdevelopmentgrowthcontinuationelongationlengtheningstretchingdrawing outOpposite shrinkingcontraction
   • ▪ an application of an existing system or activity to a new area: "direct marketing is an extension of telephone selling"
   • ▪ an increase in the length of time given to someone to hold office, complete a project, or fulfill an obligation: "the initial term of appointment is for one year, but an extension of two years is envisaged" Similar prolongationlengtheningincreaseprotractioncontinuationperpetuationpostponementdeferraldelaylonger periodmore/extra timeincreased timeadditional timeOpposite shortening
   • ▪ an optional suffix to a file name, typically consisting of a period followed by several characters, indicating the file's content or function.
   • 2. a length of electric cord that permits the use of an appliance at some distance from a fixed socket.
   • 3. an extra telephone on the same line as the main one: "you can listen on the extension in the bedroom"
   • ▪ a subsidiary telephone in a set of offices or similar building, on a line leading from the main switchboard but having its own additional number: "contact Liz McDonald on extension 3514"
   • 4. the action of moving a limb from a bent to a straight position: "seizures with sudden rigid extension of the limbs"
   • ▪ the ability of a dancer to raise one leg above their waist, especially to the side: "she has amazing extension"
   • ▪ the application of traction to a fractured or dislocated limb or to an injured or diseased spinal column to restore it to its normal position.
   • ▪ the lengthening of a horse's stride within a particular gait.
   • 5. instruction by a university or college for students who do not attend full time: "extension courses"
   • 6. the range of a term or concept as measured by the objects that it denotes or contains, as opposed to its internal content.
   • 7. the property of occupying space; spatial magnitude: "nature, for Descartes, was pure extension in space"

   Word Origin late Middle English: from late Latin extensio(n-), from extendere ‘stretch out’ (see extend).

   Derivatives

   • 1. extensional adjective

   Scrabble Points: 16

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   More definitions, origin and scrabble points

2. www.merriam-webster.com › dictionary › extensionExtension Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › extension

   • Cached

   The meaning of EXTENSION is the action of extending : state of being extended. How to use extension in a sentence.

3. dictionary.cambridge.org › dictionary › englishEXTENSION | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   a new part added to a house or other building: extension to We're building an extension to our house.

4. www.dictionary.com › browse › extensionEXTENSION Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › extension

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   noun. an act or instance of extending, lengthening, stretching out, or enlarging the scope of something. Synonyms: dilation, increase, enlargement, expansion. Antonyms: contraction. 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.

5. www.vocabulary.com › dictionary › extensionExtension - Definition, Meaning & Synonyms - Vocabulary.com

   www.vocabulary.com › dictionary › extension

   An extension is the act of getting more time, space, or length, like an extension of a deadline that gives you one more day to turn in a paper, or extensions that make your hair look longer. The noun extension comes from the Latin word extendere, meaning “stretch out.”

6. dictionary.cambridge.org › us › dictionaryEXTENSION | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

   • Cached

   the fact of reaching, stretching, or continuing; the act of adding to something in order to make it bigger or longer: extension of The extension (= increasing) of police powers in the province has been heavily criticized. The article is an extension of (= takes further) the ideas Professor Fox developed in an earlier book.

7. www.collinsdictionary.com › dictionary › englishEXTENSION definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

   • Cached

   An extension is an extra period of time for which something lasts or is valid, usually as a result of official permission. He first entered Britain on a six-month visa, and was given a further extension of six months. [+ of] Synonyms: lengthening, extra time, continuation, postponement More Synonyms of extension. 4. countable noun B2.

8. www.thefreedictionary.com › extensionExtension - definition of extension by The Free Dictionary

   www.thefreedictionary.com › extension

   • Cached

   ex·ten·sion. (ĭk-stĕn′shən) n. 1. The act of extending or the condition of being extended: the extension of the subway into the suburbs. 2. The amount, degree, or range to which something extends or can extend: The wire has an extension of 50 feet. 3. a. The act of straightening or extending a limb. b. The position assumed by an extended limb. 4.

9. www.oxfordlearnersdictionaries.com › definition › englishextension noun - Definition, pictures, pronunciation and usage...

   www.oxfordlearnersdictionaries.com › definition › english

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   [uncountable, countable] extension (of something) the act of increasing the area of activity, group of people, etc. that is affected by something. the extension of new technology into healthcare; a gradual extension of the powers of central government; The bank plans various extensions to its credit facilities.

10. www.oxfordlearnersdictionaries.com › definition › american_englishextension noun - Definition, pictures, pronunciation and usage...

    www.oxfordlearnersdictionaries.com › definition › american_english

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    Definition of extension noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

11. www.wordreference.com › definition › extensionextension - WordReference.com Dictionary of English

    www.wordreference.com › definition › extension

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    the state of being extended. that by which something is extended; 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 can be extended; an extended object: a table with drop-leaf extensions. range of extending;