Definition of extension
3a : the stretching of a fractured or dislocated limb so as to restore it to its natural positionb : 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 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 additionb : a section or line segment forming an additional lengthc : an extra telephone connected to the principal lined : a length of natural or synthetic hair that is worn attached to one's natural haire : 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 of extension from the Web
Williams said the play of Peraza and Herrera is not the driving force behind exploring an extension with Cozart, and pointed out that the presence of Scooter Gennett gives the Reds an infield insurance policy who is already under team control.
Trump is prone to thinking out loud even when those thoughts suggest plans that are potentially damaging to the credibility of his office and by extension the country.
In 2015, Jones agreed to a contract extension through March 31, 2018.
State officials are hoping to win a 21-month extension of an agreement that began in 2011 and will expire in December.
Her first big find along the subway extension came last November, when workers at the site of the future La Brea station unearthed a small mammoth or mastodon skull, its tusks still attached.
His career in the technology industry makes the iPad an extension of his arm.
Demi revealed her makeover on Instagram earlier in the week, showing off mermaid-long extensions and a deep, chocolate-brown color.
Perhaps this all broke down around negotiations for a contract extension.
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.
Origin and Etymology of extension
Middle English, from Late Latin extension-, extensio, from Latin extendere
First Known Use: 15th centurySee Words from the same year
EXTENSION Defined for Kids
Definition of extension for Students
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
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 1
Legal Definition of extension
: an increase in length of time; specifically : an increase in the time allowed under an agreement
Learn More about extension
See words that rhyme with extension Thesaurus: All synonyms and antonyms for extension Spanish Central: Translation of extension Nglish: Translation of extension for Spanish speakers Britannica English: Translation of extension for Arabic speakers Britannica.com: Encyclopedia article about extension
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