extensionnoun
uk/ɪkˈsten.ʃən/us/ɪkˈsten.ʃən/extension noun (REACH)
B2 [ C or U ] the fact of reaching, stretching, or continuing; the act of adding to something in order to make it bigger or longer:
More examples
- The planned extension to the motorway near London is going to cost over £4 million.
- The boss is refusing to let us have any extension on the deadline for this job.
- The new job would involve a significant extension to your current area of responsibility.
- The company was granted an extension allowing it to continue using the old trains for a further three months.
- After three extensions to his job contract, he was told they would not be renewing it again.
Thesaurus: synonyms and related words
Becoming bigger
- accrue
- augment
- billow
- bloat
- broaden
- bump
- engorged
- enlarge
- enlargement
- expansion
- extend
- grow
- oak
- puff up
- regenerate
- scalability
- scalable
- scaleable
- shoot
- stretch
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You can also find related words, phrases, and synonyms in the topics:
extension noun (PHONE)
B2 [ C ] any of two or more phones in the same house that share the same number, or any of a number of phones connected to a switchboard in a large building such as an office:
Thesaurus: synonyms and related words
Communications - telephone equipment
- android
- Ansaphone
- answerphone
- brick
- cardphone
- cell
- cell phone
- cradle
- ext
- GPRS
- hands-free
- handset
- kiosk
- landline
- linesman
- phone card
- speed dial
- telephone
- telephone exchange
- videophone
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extension noun (COMPUTER)
[ C ] the last part of the name of a computer file, which comes after a (.) and shows what type of file it is
Thesaurus: synonyms and related words
Computer concepts
- aeroplane mode
- airplane mode
- atomicity
- augmented reality
- back end
- clone
- cloud
- corruption
- default to sth
- electronic
- gigabyte
- GUI
- multimedia
- reboot
- template
- tuple
- virtual
- virtually
- web hosting
- what you see is what you get idiom
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extension noun (HAIR)
also hair extension [ C usually plural ] a long piece of hair that is added to a person's own hair in order to make the hair longer
extension noun (BUILDING)
[ C ] UK US addition a new part added to a house or other building:
Thesaurus: synonyms and related words
Parts of buildings in general
- addition
- annex
- annexe
- elevation
- façade
- foundation
- frontage
- superstructure
- wing
extensionadjective [ only before noun ]
uk/ɪkˈsten.ʃən/us/ɪkˈsten.ʃən/intended to support students' learning by making them try different or more difficult things in addition to their basic work:
US UK extramural offered by a university to people who are not studying for a degree there :
Thesaurus: synonyms and related words
Classes & courses
- access course
- advanced
- classwork
- correspondence course
- coursework
- foundation course
- homework
- interdisciplinary
- introduction
- introductory course
- lecture
- module
- practical
- prep
- reception
- refresher
- role play
- sandwich course
- schoolwork
- seminar
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