making something affect more people or activities
My home life felt like an extension of my job.
a new room added to a house
They are building an extension to add more space.
a new part added to a building
The hospital is getting a new extension.
more time to finish something
She got an extension to complete her work.
an extra phone line with its own number
Please connect me to extension 4332.
making something longer or larger
The subway extension will take months to build.
fake hair added to make hair longer
These hair extensions are easy to use.
a part of a college for part-time students
La Salle Extension University offers evening classes.
the letters after the dot in a file name
The file extension .doc shows it is a document.
an extra piece of wire to make a cord longer
Use an extension cord to reach the outlet.