extension

noun
ex·​ten·​sion | \ ik-ˈsten(t)-shən How to pronounce extension (audio) \

Definition of extension

1a : the action of extending : state of being extended
b : an enlargement in scope or operation tools are extensions of human hands
2a : the total range over which something extends : compass
3a : the stretching of a fractured or dislocated limb so as to restore it to its natural position
b : an unbending movement around a joint in a limb (such as the knee or elbow) that increases the angle between the bones of the limb at the joint — compare flexion sense 4a
4 : a property whereby something occupies space
5 : an increase in length of time specifically : an increase in time allowed under agreement or concession
6 : a program that geographically extends the educational resources of an institution by special arrangements (such as correspondence courses) to persons otherwise unable to take advantage of such resources
7a : a part constituting an addition
b : a section or line segment forming an additional length
c : an extra telephone connected to the principal line
d : a length of natural or synthetic hair that is worn attached to one's natural hair
e : a series of usually three or four characters following a dot at the end of the name of a computer file that specifies the file's format or purpose
8 : a mathematical set (such as a field or group) that includes a given and similar set as a subset

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Examples of extension in a Sentence

extension of the patient's life He's asking for a contract extension. Make sure that the muscles get the proper amount of extension. I missed the deadline but was granted an extension.
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Recent Examples on the Web

Mendel sees her new venture as a sensible extension of the family business. Laird Borrelli-persson, Vogue, "Maison Atia Is a Kate Moss–Approved Luxury Faux-Fur Brand That Plays With the Concept of Heritage," 13 Feb. 2019 For more than 10 years, the kids from TLC's Kate Plus 8 (formerly Jon and Kate Plus 8) felt like an extension of own family. Amanda Garrity, Good Housekeeping, "Kate Gosselin's Daughters Mady and Cara Are 18 Years Old — Here's What They're Up to Now," 13 Feb. 2019 While Many Americans saw a trip to the moon as the logical extension of spaceflight, the engineers at NASA were faced with some hard numbers. Alex Hollings, Popular Mechanics, "The Saturn V Story: From Nazi Roots to America's Moon Rocket," 6 Feb. 2019 Beijing is using companies like Huawei and ZTE as an extension of its intelligence network, engaging in criminal behavior to advance not only the bottom line but the interests of the Chinese state. Mike Rogers, WSJ, "The 5G Promise and the Huawei Threat," 28 Jan. 2019 The extension comes days after South Sudan’s government said the government and opposition had agreed to reinstate opposition leader Riek Machar as first vice president. Sam Mednick, BostonGlobe.com, "South Sudan lawmakers extend president’s term until 2021," 13 July 2018 The extension comes days after South Sudan's government said the government and opposition had agreed to reinstate opposition leader Riek Machar as first vice president. Sam Mednick, Fox News, "South Sudan lawmakers extend president's term until 2021," 12 July 2018 If the show is successful, studios will renegotiate an actor’s salary and provide a raise in return for an extension of the actor’s contract. Joe Flint, WSJ, "Fox Cuts Jussie Smollett From Final Episodes of ‘Empire’ Season," 22 Feb. 2019 Besides, the deadline hasn’t passed for the things the SEC demands in the settlement to be put into place; that deadline is December 28th, though the language of the settlement indicates that Tesla and Musk can ask for an extension if necessary. Elizabeth Lopatto, The Verge, "Elon Musk doesn’t respect the SEC, which is still investigating Tesla," 14 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'extension.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of extension

15th century, in the meaning defined at sense 1a

History and Etymology for extension

Middle English, from Late Latin extension-, extensio, from Latin extendere

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Statistics for extension

Last Updated

12 Mar 2019

Look-up Popularity

Time Traveler for extension

The first known use of extension was in the 15th century

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More Definitions for extension

extension

noun

English Language Learners Definition of extension

: the act of making something longer or greater
: the act of straightening or stretching something (such as an arm or a leg)
: extra time allowed for doing something

extension

noun
ex·​ten·​sion | \ ik-ˈsten-shən How to pronounce extension (audio) \

Kids Definition of extension

1 : the act of making something longer or greater extension of the sail
2 : an increase in length or time
3 : a part forming an addition or enlargement

extension

noun
ex·​ten·​sion | \ ik-ˈsten-chən How to pronounce extension (audio) \

Medical Definition of extension

1 : the stretching of a fractured or dislocated limb so as to restore 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 sense 1

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extension

noun
ex·​ten·​sion

Legal Definition of extension

: an increase in length of time specifically : an increase in the time allowed under an agreement

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Comments on extension

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