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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

   • E

     1

   • X

     8

   • T

     1

   • E

     1

   • N

     1

   • S

     1

   • I

     1

   • O

     1

   • N

     1

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

   www.merriam-webster.com › dictionary › extension

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   Learn the various meanings and uses of the word extension, from the action of extending to the extra characters at the end of a file name. See synonyms, examples, word history, and related phrases for extension.

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

   dictionary.cambridge.org › dictionary › english

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   Learn the meaning of extension in different contexts, such as reach, phone, computer, hair, building, and exercise. Find synonyms, antonyms, and related words for extension.

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

   www.dictionary.com › browse › extension

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   Extension is a noun that means an act or instance of extending, lengthening, stretching out, or enlarging something. It can also refer to an additional period of time, a property of matter, a function, a computer file type, and more.

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

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   Learn the meaning of extension as a noun or adjective in different contexts, such as reach, phone, computer, hair, building, and education. See how to use extension in sentences and phrases with synonyms and antonyms.

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

   www.collinsdictionary.com › dictionary › english

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   Learn the various meanings and uses of the word extension, such as a new room, a phone line, or an extra time. See synonyms, pronunciation, examples, and related terms.

8. www.oxfordlearnersdictionaries.com › english › extensionextension noun - Definition, pictures, pronunciation and usage...

   www.oxfordlearnersdictionaries.com › english › extension

   • Cached

   [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.