Difference Between
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Extention vs. Extension: Decoding the Right Spelling

Shumaila Saeed
By Shumaila Saeed || Updated on December 25, 2023
"Extention" is an incorrect spelling, while "Extension" is correct, referring to an addition or continuation of something.
Extention vs. Extension

Which is correct: Extention or Extension

How to spell Extension?

Extention is Incorrect

Extension is Correct

How to remember correct spelling of Extension?

Visualize 'Extension' as 'ex-tension,' focusing on the 's' sound.
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Dec 23, 2023
Remember that 'Extension' extends the word 'extend' with 'sion.'
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Dec 23, 2023
Think of 'Extension' as an extra 's-tretch' of something, emphasizing the 's.'
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Dec 23, 2023
Associate 'Extension' with 'tense,' as both words contain the 's' sound, not 't.'
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Dec 23, 2023
Link 'Extension' with 'expansion,' both having the 'sion' ending.
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Dec 23, 2023

Extension Definitions

Continuation Beyond Usual Limit
An extension on a project deadline.
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Dec 14, 2023
Computer File Format
The .jpg extension in file names indicates image format.
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Dec 14, 2023
Physical Movement Increase
Stretching exercises for muscle extension.
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Dec 14, 2023
The act of extending or the condition of being extended
The extension of the subway into the suburbs.
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Oct 19, 2023
The amount, degree, or range to which something extends or can extend
The wire has an extension of 50 feet.
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Oct 19, 2023
The act of straightening or extending a limb.
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Oct 19, 2023
The position assumed by an extended limb.
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Oct 19, 2023
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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Oct 19, 2023
(Medicine) The application of traction to a fractured or dislocated limb to restore the normal position.
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Oct 19, 2023
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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Oct 19, 2023
An additional telephone connected to a main line.
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Oct 19, 2023
An allowance of extra time, as for the repayment of a debt.
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Oct 19, 2023
The period of this extra time
Three months' extension on the loan.
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Oct 19, 2023
The property of an object by which it occupies space.
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Oct 19, 2023
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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Oct 19, 2023
A publicly funded program offering such instruction along with information on agriculture, home economics, and business.
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(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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Oct 19, 2023
(Logic) The class of objects designated by a specific term or concept; denotation.
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Oct 19, 2023
(Mathematics) A set that includes a given and similar set as a subset.
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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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The state of being extended
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That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension")
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A part of a building that has been extended from the original
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(semantics) Capacity of a concept or general term to include a greater or smaller number of objects; — correlative of intension.
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Semantic widening, broadening of meaning
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A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
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(medicine) The operation of stretching a broken bone so as to bring the fragments into the same straight line.
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Oct 19, 2023
(weightlifting) An exercise in which an arm or leg is straightened against resistance.
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Oct 19, 2023
(fencing) A simple offensive action, consisting of extending the weapon arm forward.
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Oct 19, 2023
(telecommunication) A numerical code used to specify a specific telephone in a telecommunication network.
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(computing) A file extension.
Files with the .txt extension usually contain text.
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Oct 19, 2023
(computing) An optional software component that adds functionality to an application.
A browser extension
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Oct 19, 2023
(logic) The set of tuples of values that, used as arguments, satisfy the predicate.
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Oct 19, 2023
(grammar) A kind of derivative morpheme applied to verbs in Bantu languages.
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Oct 19, 2023
(education) University programs that are targeted at the broader (usually adults) community whose participants are not full-time enrolled students.
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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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Oct 19, 2023
That property of a body by which it occupies a portion of space.
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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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The operation of stretching a broken bone so as to bring the fragments into the same straight line.
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The straightening of a limb, in distinction from flexion.
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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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Act of expanding in scope; making more widely available;
Extension of the program to all in need
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The spreading of something (a belief or practice) into new regions
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An educational opportunity provided by colleges and universities to people who not enrolled as regular students
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Act of stretching or straightening out a flexed limb
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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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Oct 19, 2023
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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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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Amount or degree or range to which something extends;
The wire has an extension of 50 feet
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An additional telephone set that is connected to the same telephone line
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An addition to the length of something
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An addition that extends a main building
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Lengthening or Addition
An extension to a building, like adding a new wing to a house.
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Additional Telephone Line
A separate phone line, known as a phone extension.
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Dec 14, 2023

Repeatedly Asked Queries

What is the correct spelling for an addition to something?

The correct spelling is 'Extension.'
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Dec 23, 2023

Can 'Extension' refer to time?

Yes, 'Extension' can mean prolonging a time period, like a deadline.
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Dec 23, 2023

Is 'Extention' ever used in English?

No, 'Extention' is a common misspelling and not recognized in standard English.
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Dec 23, 2023

What does 'Extension' imply in construction?

In construction, 'Extension' refers to an addition to an existing building or structure.
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How is 'Extension' used in technology?

In technology, 'Extension' often refers to file formats or software add-ons.
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What is the origin of 'Extension'?

'Extension' comes from Latin 'extendere' meaning to stretch out or expand.
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How does one use 'Extension' in a sentence?

'Extension' is used as a noun, e.g., "We built an extension to our home."
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Dec 23, 2023

How is 'Extension' used in telecommunications?

In telecommunications, an 'Extension' is an additional phone line connected to the main line.
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Dec 23, 2023

Does 'Extension' have a different meaning in education?

In education, 'Extension' can refer to additional courses or programs beyond the standard curriculum.
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Dec 23, 2023

Can 'Extension' be used in a physical context?

Yes, 'Extension' describes the act of stretching or lengthening a body part.
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Dec 23, 2023

What role does 'Extension' play in physical fitness?

In fitness, 'Extension' refers to exercises that increase the length of muscles and improve flexibility.
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Dec 23, 2023

Is 'Extension' used in business terminology?

In business, 'Extension' can refer to the expansion of a product line or services.
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Dec 23, 2023

Does 'Extension' have a specific meaning in hair styling?

In hair styling, 'Extensions' are artificial additions to natural hair for length or volume.
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Dec 23, 2023

Are there any common phrases or expressions involving 'Extension'?

Common phrases with 'Extension' include 'granting an extension' for deadlines or 'filing for an extension' in tax contexts.
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Dec 23, 2023

Can 'Extension' apply to academic research?

Yes, 'Extension' in academic research can mean the continuation or further exploration of a study.
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Dec 23, 2023

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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