extension

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extension /ɪkˈstɛnʃən/ noun
plural extensions
extension
/ɪkˈstɛnʃən/
noun
plural extensions
Learner's definition of EXTENSION
: the act of extending something: such as
: the act of making something longer or greater
[noncount]
[count]
: the act of straightening or stretching something (such as an arm or a leg)
[count]
[noncount]
[count] : extra time allowed for doing something
[count] : something (such as an interest or activity) that develops from something else + of
◊ The phrase by extension is used to say that what follows comes from or is connected with something that has already been mentioned.
[count]
: a part that is added on to something to make it larger or longer
[count] : an extra telephone that is connected to the main line
also : a telephone number that connects to a particular extension
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