Bedeutung von "extension" Essential English Dictionary

extension

noun uk /ɪkˈstenʃən/

a telephone that is connected to the main telephone in an office or other large building:

Call me on extension 3104.

extra time that you are given to do or use something:

I’ve applied for an extension to my visa.

something that is added on to something else to make it longer or bigger:

hair extensions
an extension to the underground line

UK a new room or rooms that are added to a building:

You could build an extension on to the back of the house.

(Definition von "extension" von Cambridge Essential Dictionary © Cambridge University Press)