[n] act of expanding in scope; making more widely available; "extension of the program to all in need"
[n] act of stretching or straightening out a flexed limb
[n] an educational opportunity provided by colleges and universities to people who not enrolled as regular students
[n] an addition that extends a main building
[n] an addition to the length of something
[n] an additional telephone set that is connected to the same telephone line
[n] amount or degree or range to which something extends; "the wire has an extension of 50 feet"
[n] 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"
[n] the spreading of something (a belief or practice) into new regions
[n] 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"