[noun] 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"
[noun] act of expanding in scope; making more widely available; "extension of the program to all in need"
[noun] the spreading of something (a belief or practice) into new regions Synonyms:propagation
[noun] an educational opportunity provided by colleges and universities to people who not enrolled as regular students Synonyms:service, university
[noun] act of stretching or straightening out a flexed limb
[noun] 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" Synonyms:filename file name
[noun] 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" Synonyms:reference, denotation
[noun] 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"
[noun] amount or degree or range to which something extends; "the wire has an extension of 50 feet" Synonyms:lengthiness, prolongation
[noun] an additional telephone set that is connected to the same telephone line Synonyms:telephone phone
[noun] an addition to the length of something Synonyms:elongation
[noun] an addition that extends a main building Synonyms:annex, annexe, wing