extension
Pluralextensions
- 1The act of making something longer, bigger, or last more time.
Like pulling a rubber band to make it longer.
The extension of the school day means kids stay an hour longer.
We asked the landlord for an extension of our rental period.
Similarlengthening, prolongation, expansion, stretching, enlargement
Oppositeshortening, contraction, reduction, curtailment
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- 2A written promise from a lender that gives a borrower more time to pay back money.
Like a teacher giving you extra days to hand in your homework.
The bank gave him an extension so he could pay the loan next month.
She signed an extension to delay her payment by sixty days.
Similardeferral, postponement, deferment, reprieve
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- 3
- 4A short number that connects you to one phone in a larger office system.
Like a room number inside one big building.
Dial his extension to reach him directly.
Her extension rings twice before it goes to voicemail.
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- 5
- 6Ellipsis of file extension. The part of a file name after the dot that shows its type.
Save the document with a .txt extension.
Your computer uses the extension to pick the right program.
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- 7A part that grows out from something and adds to what it can do.
Like a longer handle that lets a tool reach farther.
The new app is really an extension of the company's main service.
Her phone feels like an extension of her hand.
Similarcontinuation, outgrowth, expansion, development
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- 8Clipping of hair extension, or of nail or eyelash extension. Extra length added to hair, nails, or lashes.
She got a new extension put in to make her hair longer.
The salon glued each extension close to the root.
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- 9An exercise where you straighten an arm or leg while pushing against weight.
Like opening a folding ruler until it is straight.
He did three sets of leg extension at the gym.
Add a triceps extension to work the back of your arms.
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- 10College classes made for adults in the community who are not full-time students.
Like a public class run by a university for people who live nearby.
Many adults take evening classes through the college's extension.
The extension offers cooking and language courses to local residents.
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- 11
- 12The pulling of a broken bone to bring its pieces back into a straight line.
Like gently pulling apart the two ends of a snapped stick so the broken edges line up again.
The doctor used extension to line up the broken bone before setting it in a cast.
Gentle extension of the leg helped move the fracture back into place.
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- 13The way an object takes up room in space.
Like the way a box takes up room on a shelf: it has size you can measure.
Every solid thing has extension, because it fills some amount of space.
A single point has no extension at all.
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- 14In fencing, the move of straightening the sword arm forward toward your opponent.
Like reaching your arm out straight to point at something across the room.
A quick extension can surprise an opponent who isn't ready.
She began her attack with a smooth extension toward his chest.
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- 15The number of things that a word or idea can cover.
Like a basket: a bigger basket can hold more things inside it.
The word 'animal' has a wide extension, because it covers so many creatures.
A narrow extension means a word names only a few things.
Similardenotation
Oppositeintension
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- 16When a word grows to mean more things than it used to.
Like a small puddle slowly spreading until it covers much more ground.
Through extension, the word 'holiday' came to mean any day off, not just a holy day.
Many everyday words broaden their meaning through extension over time.
Similarbroadening, widening, generalization
Oppositenarrowing, specialization, restriction
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- 17In logic, the collection of things for which a rule comes out true.
Like a guest list: it names exactly who counts as included.
The extension of 'is even' is all the even numbers.
You can list a predicate's extension by checking which items fit it.
Oppositeintension
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- 18In math, a larger group built by fitting one group inside another in a set way.
Like nesting dolls, where a smaller group sits neatly inside a bigger one.
An extension combines a smaller group and a larger one into a new whole.
Mathematicians study how one group sits inside an extension.
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- 19In math, a structure that links two objects, with one of them sitting inside it.
Like a sandwich, where one filling layer sits between two others as a single whole.
An extension joins two modules into a single larger one.
You can ask whether an extension breaks apart into separate pieces.
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- 20In math, the new ideal formed when an ideal is carried over by a map between rings.
The extension of an ideal can be larger than its original image.
Mathematicians study how an ideal behaves under extension to another ring.
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- 21In some African languages, a small part added to a verb to change its meaning.
Like adding an ending to a word to change its meaning, the way '-ful' turns 'care' into 'careful.'
An extension can turn a verb into a form meaning 'do something for someone.'
Bantu verbs often take more than one extension at the end.
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Practice
Can you tell the meanings of extension apart? Answer 3 quick questions from this page, or write your own sentence and AI will check it.
Origin
It comes from Latin "extensiō", which reached English through Old French and Middle English.