Meaning of EXTENSION in English

EXTENSION

(~s)

1.

An ~ is a new room or building which is added to an existing building or group of buildings.

N-COUNT

2.

An ~ is a new section of a road or rail line that is added to an existing road or line.

...the Jubilee Line ~.

N-COUNT: usu with supp

3.

An ~ is an extra period of time for which something lasts or is valid, usually as a result of official permission.

He first entered Britain on a six-month visa, and was given a further ~ of six months...

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4.

Something that is an ~ of something else is a development of it that includes or affects more people, things, or activities.

Many Filipinos see the bases as an ~ of American colonial rule...

N-COUNT: usu N of n

5.

An ~ is a telephone line that is connected to the switchboard of a company or institution, and that has its own number. The written abbreviation ext. is also used.

She can get me on ~ 308...

N-COUNT: also N num

6.

An ~ is a part which is connected to a piece of equipment in order to make it reach something further away.

...a 30-foot ~ cord...

N-COUNT

Collins COBUILD.      Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) .