(an example of) the act of extending or being extended
a part which is added to make sth longer, wider, or larger
any of many telephone lines which connect various rooms or offices in a large building to the switchboard
"they applied for an extension of the loan"
"extension of the program to all in need"
"most applications provide extensions for the files they create"
"most BASIC files use the filename extension .BAS"
"the extension of `satellite of Mars' is the set containing only Demos and Phobos"
"the dancer was praised for her uncanny extension"
"good extension comes from a combination of training and native ability"
"the wire has an extension of 50 feet"
The metaphor of the psychic voyage is an extension of the romantic idea of travel.
出自： S. Sontag