extension
noun
ex·ten·sion
ik-ˈsten(t)-shən 
1
2
3
a
: 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
7
a
: 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
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.
Recent Examples on the Web
For a beauty brand that plays in both the fragrance and hair care arena, a hair perfume feels like a natural extension—after all, what many users associate with their favorite hair care products is, of course, a scent.
—
Kiana Murden, Vogue, 4 Mar. 2025
The project at 2850 W. Fletcher St. was moving forward, albeit slowly, before the Design Review Commission in November denied a time extension sought by the developers.
—Nick Rosenberger, Idaho Statesman, 4 Mar. 2025
On Tuesday, the Dallas Cowboys agreed to terms on an extension with starting defensive tackle Osa Odighizuwa that will keep him in Dallas for four years with an $80 million price tag, according to multiple sources.
—Nick Harris, Fort Worth Star-Telegram, 4 Mar. 2025
Google, for example, only plans to keep TikTok available in its app store until the end of President Trump's 75-day extension of the ban on the app, a source familiar with the company's efforts told Axios.
—Sara Fischer, Axios, 4 Mar. 2025
See All Example Sentences for extension
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Kiana Murden, Vogue, 4 Mar. 2025
The project at 2850 W. Fletcher St. was moving forward, albeit slowly, before the Design Review Commission in November denied a time extension sought by the developers.
—Nick Rosenberger, Idaho Statesman, 4 Mar. 2025
On Tuesday, the Dallas Cowboys agreed to terms on an extension with starting defensive tackle Osa Odighizuwa that will keep him in Dallas for four years with an $80 million price tag, according to multiple sources.
—Nick Harris, Fort Worth Star-Telegram, 4 Mar. 2025
Google, for example, only plans to keep TikTok available in its app store until the end of President Trump's 75-day extension of the ban on the app, a source familiar with the company's efforts told Axios.
—Sara Fischer, Axios, 4 Mar. 2025
See All Example Sentences for extension
Cite this Entry
“Extension.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extension. Accessed 12 Mar. 2025.
Copy CitationKids Definition
extension
noun
ex·ten·sion
ik-ˈsten-chən
1
: the act of extending : the state of being extended
2
: an increase in time
was given an extension to finish his project
3
: education by special programs at a distance from a school
4
a
: a part forming an addition or increase
b
: an extra telephone connected to the main line
Medical Definition
extension
noun
ex·ten·sion
ik-ˈsten-chən
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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