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Definition extension in British English

extension noun

noun
/ɪkˈstenʃ(ə)n/
1

an extra room or rooms added to a building

Example

We are building an extension on the back of our house.

Example

He has applied for permission to build a single-storey extension to his house.

Synonyms and related words
1.1

a part of a road or railway line added to the existing one

Example

a proposed motorway extension

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2

a telephone line that is one of several lines coming from a main line

Example

What's your extension?

Example

I'm on extension 334.

Example

a new extension number

Synonyms and related words
3

extra time that you are given to finish a piece of work, especially at college or university

Example

I'm going to ask for an extension on this essay.

Synonyms and related words
3.1

extra time that you are given to pay money that you owe

Example

Will the bank give you an extension on the loan?

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3.2

extra time that you are given to use a particular legal document or right

Example

a visa extension

Example

Brady wants a two-year extension to his contract.

3.3

extra time that a shop, business, or bar is allowed to stay open

Example

There was a bar extension until midnight.

Example

Local shops have been granted an extension to opening hours.

4

something that you add to a long thin object to make it able to reach somewhere

Example

This lead isn't long enough - do you have an extension?

Synonyms and related words
4.1

long pieces of artificial hair that can be fastened to someone's hair to make it look longer

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5

something that develops from a particular custom, activity, idea etc

Example

Business entertainment seems a natural extension of Japan's gift-giving culture.

Example

He sees local history as an extension of family history.

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6

the action of stretching part of your body

Example

His leg was now capable of full extension.

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7

an increase in the power of something

Example

the further extension of state control

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8

the last part of the name of a computer file. For example, 'exe' and 'doc' are extensions.

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9

in the UK, a system in which students can take courses at a university without being full-time students

Example

courses provided through university extension

Synonyms and related words
Definition extension in British English