• act of expanding in scope; making more widely available; "Extension of the program to all in need"
• act of stretching or straightening out a flexed limb
• an educational opportunity provided by colleges and universities to people who not enrolled as regular students
• an addition that extends a main building
• an addition to the length of something
• an additional telephone set that is connected to the same telephone line
• amount or degree or range to which something extends; "the wire has an Extension of 50 feet"
• the ability to raise the working leg high in the air; "the dancer was praised for her uncanny Extension"; "good Extension comes from a combination of training and native ability"
• the most direct or specific meaning of a word or expression; the class of objects that an expression refers to; "the Extension of `satellite of Mars'' is the set containing only Demos and Phobos"
• the spreading of something (a belief or practice) into new regions
• a string of characters beginning with a period and followed by one to three letters; the optional second part of a PC computer filename; "most applications provide Extensions for the files they create"; "most BASIC files use the filename Extension .BAS"
• a mutually agreed delay in the date set for the completion of a job or payment of a debt; "they applied for an Extension of the loan"

'Extension' in other languages