Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “extension”

extension

noun [C]
 
 
/ɪkˈstenʃən/
PART OF A BUILDING a new room or rooms that are added to a building: You could build an extension onto the back of the house.Parts of buildings in general
EXTRA TIME B2 extra time that you are given to do or use something: You might be able to get an extension on your visa.Delaying and wasting time
TELEPHONE B2 a telephone that is connected to the main telephone in an office or other large building: Call me on extension 213.Telephone equipment
(Definition of extension from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

More Learner's Dictionary definitions for “extension”

Definitions of “extension” in other dictionaries

Word of the Day

light at the end of the tunnel

signs of improvement in a situation that has been bad for a long time, or signs that a long and difficult piece of work is almost finished

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More