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
Synonyms
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
This is an extension of an ongoing trend in the financial services industry.
—
Paul Davis, Forbes, 2 Jan. 2025
The initial pause expired on December 20, but a day earlier, Leading Light Wind requested an extension from the board, seeking to push the deadline to May 20.
—Paul Du Quenoy, Newsweek, 1 Jan. 2025
Of the current squad, the players on deals due to expire at the end of this season are Christian Eriksen, Victor Lindelof, Jonny Evans, Tom Heaton, Harry Maguire and Amad; the latter two are in negotiations and have contracts which include a one-year extension the club can trigger.
—Philip Buckingham, The Athletic, 31 Dec. 2024
The corporate tax letter asks for an extension of cuts that came with the Tax Cuts and Jobs Act of 2017.
—Jon Styf | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 30 Dec. 2024
See all Example Sentences for extension 
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Paul Davis, Forbes, 2 Jan. 2025
The initial pause expired on December 20, but a day earlier, Leading Light Wind requested an extension from the board, seeking to push the deadline to May 20.
—Paul Du Quenoy, Newsweek, 1 Jan. 2025
Of the current squad, the players on deals due to expire at the end of this season are Christian Eriksen, Victor Lindelof, Jonny Evans, Tom Heaton, Harry Maguire and Amad; the latter two are in negotiations and have contracts which include a one-year extension the club can trigger.
—Philip Buckingham, The Athletic, 31 Dec. 2024
The corporate tax letter asks for an extension of cuts that came with the Tax Cuts and Jobs Act of 2017.
—Jon Styf | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 30 Dec. 2024
See all Example Sentences for extension
Dictionary Entries Near extension
Cite this Entry
“Extension.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extension. Accessed 18 Jan. 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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