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Extention vs. Extension — Which is Correct Spelling?

By Tayyaba Rehman — Updated on August 22, 2023
"Extention" is the incorrect spelling, while "Extension" is the correct one. Extension refers to the act of extending or lengthening.
Extention vs. Extension — Which is Correct Spelling?

Which is correct: Extention or Extension

How to spell Extension?

Extention

Incorrect Spelling

Extension

Correct Spelling
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Key Differences

"TEN" is a simple word, but "Extension" has a "SION" at the end, not "TION."
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Aug 22, 2023
Visualize an "extension cord" and focus on the "sion" at the end.
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Aug 22, 2023
Associate with the word "expansion" – both have "sion" endings.
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Aug 22, 2023
Remember the word "sion" as a common suffix, like in "decision" or "compression."
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Aug 22, 2023
Think of "tension" which uses "sion," and "extension" is just adding an "ex" to it.
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Aug 22, 2023
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Extension Definitions

Extension is the act of making something longer or covering a larger area.
The house underwent an extension to add more rooms.
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Aug 22, 2023
Extension is a continuation of a telephone line to a further point.
She answered the call from the kitchen extension.
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Aug 22, 2023
Extension refers to a part that is added to something to enlarge or prolong it.
We added an extension to the dining table for extra guests.
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Aug 22, 2023
In computing, an extension denotes a set of characters added to a file name to determine its format.
The image had a .jpg extension.
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Aug 22, 2023
The act of extending or the condition of being extended
The extension of the subway into the suburbs.
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May 12, 2018
The amount, degree, or range to which something extends or can extend
The wire has an extension of 50 feet.
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May 12, 2018
The act of straightening or extending a limb.
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May 12, 2018
The position assumed by an extended limb.
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May 12, 2018
A length of human or synthetic hair attached to the scalp or to strands of hair close to the scalp to add volume, length, or color.
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May 12, 2018
(Medicine) The application of traction to a fractured or dislocated limb to restore the normal position.
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May 12, 2018
An addition that increases the area, influence, operation, or contents of something
An extension for the vacuum cleaner.
Built a new extension onto the hospital wing.
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May 12, 2018
An additional telephone connected to a main line.
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May 12, 2018
An allowance of extra time, as for the repayment of a debt.
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May 12, 2018
The period of this extra time
Three months' extension on the loan.
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May 12, 2018
The property of an object by which it occupies space.
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May 12, 2018
A program in a university, college, or school offering academic instruction to nontraditional students, such as working adults, who cannot attend classes at the usual place and time.
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May 12, 2018
A publicly funded program offering such instruction along with information on agriculture, home economics, and business.
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May 12, 2018
(Computers) A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file
In most operating systems, filenames having the extension .EXE are executable files.
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May 12, 2018
(Logic) The class of objects designated by a specific term or concept; denotation.
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May 12, 2018
(Mathematics) A set that includes a given and similar set as a subset.
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May 12, 2018
The act of extending; a stretching out; enlargement in length, breadth, or time; an increase
Next month the house is undergoing an extension.
Due to the unforeseen circumstances, you are allowed an extension of two weeks to complete the task.
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May 12, 2018
The state of being extended
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May 12, 2018
That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension")
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May 12, 2018
A part of a building that has been extended from the original
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May 12, 2018
(semantics) Capacity of a concept or general term to include a greater or smaller number of objects; — correlative of intension.
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May 12, 2018
Semantic widening, broadening of meaning
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May 12, 2018
A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
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May 12, 2018
(medicine) The operation of stretching a broken bone so as to bring the fragments into the same straight line.
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May 12, 2018
(weightlifting) An exercise in which an arm or leg is straightened against resistance.
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May 12, 2018
(fencing) A simple offensive action, consisting of extending the weapon arm forward.
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May 12, 2018
(telecommunication) A numerical code used to specify a specific telephone in a telecommunication network.
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May 12, 2018
(computing) A file extension.
Files with the .txt extension usually contain text.
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May 12, 2018
(computing) An optional software component that adds functionality to an application.
A browser extension
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May 12, 2018
(logic) The set of tuples of values that, used as arguments, satisfy the predicate.
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May 12, 2018
(grammar) A kind of derivative morpheme applied to verbs in Bantu languages.
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May 12, 2018
(education) University programs that are targeted at the broader (usually adults) community whose participants are not full-time enrolled students.
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May 12, 2018
The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.
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May 12, 2018
That property of a body by which it occupies a portion of space.
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May 12, 2018
Capacity of a concept or general term to include a greater or smaller number of objects; - correlative of intension.
The law is that the intension of our knowledge is in the inverse ratio of its extension.
The extension of [the term] plant is greater than that of geranium, because it includes more objects.
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May 12, 2018
The operation of stretching a broken bone so as to bring the fragments into the same straight line.
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May 12, 2018
The straightening of a limb, in distinction from flexion.
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May 12, 2018
A mutually agreed delay in the date set for the completion of a job or payment of a debt;
They applied for an extension of the loan
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May 12, 2018
Act of expanding in scope; making more widely available;
Extension of the program to all in need
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May 12, 2018
The spreading of something (a belief or practice) into new regions
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May 12, 2018
An educational opportunity provided by colleges and universities to people who not enrolled as regular students
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May 12, 2018
Act of stretching or straightening out a flexed limb
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May 12, 2018
A string of characters beginning with a period and followed by one to three letters; the optional second part of a PC computer filename;
Most applications provide extensions for the files they create
Most BASIC files use the filename extension .BAS
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May 12, 2018
The most direct or specific meaning of a word or expression; the class of objects that an expression refers to;
The extension of `satellite of Mars' is the set containing only Demos and Phobos
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May 12, 2018
The ability to raise the working leg high in the air;
The dancer was praised for her uncanny extension
Good extension comes from a combination of training and native ability
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May 12, 2018
Amount or degree or range to which something extends;
The wire has an extension of 50 feet
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May 12, 2018
An additional telephone set that is connected to the same telephone line
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May 12, 2018
An addition to the length of something
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May 12, 2018
An addition that extends a main building
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May 12, 2018
In anatomy, extension refers to the straightening movement of limbs or joints.
The gymnast practiced her leg extension exercises daily.
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Aug 22, 2023

Common Curiosities

Why is it called Extension?

It's called "Extension" because it originates from the Latin word "extensio," meaning "a stretching out."
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Aug 22, 2023

What is the verb form of Extension?

The verb form is "extend."
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Aug 22, 2023

What is the root word of Extension?

The root word is "extend."
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Aug 22, 2023

Which vowel is used before Extension?

The vowel "a" can be used before "extension" as in "an extension."
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Aug 22, 2023

Which preposition is used with Extension?

"Of" can be used with extension, as in "extension of time."
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Aug 22, 2023

Which conjunction is used with Extension?

There's no specific conjunction exclusively used with "extension." However, "and" can be used as in "extension and renovation."
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Aug 22, 2023

What is the plural form of Extension?

The plural form is "extensions."
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Aug 22, 2023

What is the pronunciation of Extension?

It is pronounced as /ɪkˈstɛnʃən/.
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Aug 22, 2023

Is the word “Extension” a Direct object or an Indirect object?

"Extension" can be a direct object, depending on its usage in a sentence.
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Aug 22, 2023

What is a stressed syllable in Extension?

The stressed syllable is "ten."
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Aug 22, 2023

What is the first form of Extension?

The first form is the base verb "extend."
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Aug 22, 2023

What is the singular form of Extension?

The singular form is "extension."
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Aug 22, 2023

Is Extension a negative or positive word?

"Extension" is neutral; its connotation depends on context.
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Aug 22, 2023

Is Extension a countable noun?

Yes, you can have one extension or multiple extensions.
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Aug 22, 2023

Is the word Extension is Gerund?

No, "extension" is not a gerund.
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Aug 22, 2023

What is another term for Extension?

Another term can be "elongation" or "expansion."
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Aug 22, 2023

Is Extension an adverb?

No, "extension" is not an adverb.
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Aug 22, 2023

Is Extension an abstract noun?

It can be, especially when referring to a concept or idea.
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Aug 22, 2023

Is the word Extension is imperative?

No, "extension" is not an imperative.
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Aug 22, 2023

What part of speech is Extension?

"Extension" is a noun.
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Aug 22, 2023

What is the second form of Extension?

The second form is "extended."
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Aug 22, 2023

What is the third form of Extension?

The third form is also "extended."
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Aug 22, 2023

Which article is used with Extension?

Both "a" and "an" can be used, depending on the context. Example: "an extension."
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Aug 22, 2023

Is Extension a vowel or consonant?

"Extension" starts with a vowel.
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Aug 22, 2023

Is Extension a collective noun?

No, it's not a collective noun.
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Aug 22, 2023

Is the Extension term a metaphor?

Not inherently, but it can be used metaphorically in certain contexts.
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Aug 22, 2023

How many syllables are in Extension?

There are three syllables in "extension."
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Aug 22, 2023

How do we divide Extension into syllables?

It can be divided as ex-ten-sion.
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Aug 22, 2023

How is Extension used in a sentence?

"The school approved an extension for the project deadline."
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Aug 22, 2023

Is Extension a noun or adjective?

"Extension" is a noun.
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Aug 22, 2023

What is the opposite of Extension?

The opposite can be "contraction" or "reduction."
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Aug 22, 2023

Which determiner is used with Extension?

Determiners like "this," "that," "an," or "the" can be used with "extension."
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Aug 22, 2023

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Author Spotlight

Written by
Tayyaba Rehman
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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