extension

(noun) a mutually agreed delay in the date set for the completion of a job or payment of a debt. Examples: "They applied for an extension of the loan."

(noun) act of expanding in scope; making more widely available. Examples: "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 are not enrolled as regular students. Synonyms: extension service, university extension.

(noun) act of stretching or straightening out a flexed limb.

(noun) a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename. Synonyms: filename extension, file name extension. Examples: "Most applications provide extensions for the files they create." "Most basic files use the filename extension .bas."

(noun) the most direct or specific meaning of a word or expression; the class of objects that an expression refers to. Synonyms: reference, denotation. Examples: "The extension of `satellite of mars' is the set containing only demos and phobos."

(noun) the ability to raise the working leg high in the air. Examples: "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. Synonyms: lengthiness, prolongation. Examples: "The wire has an extension of 50 feet."

(noun) an additional telephone set that is connected to the same telephone line. Synonyms: telephone extension, extension phone.

(noun) an addition to the length of something. Synonyms: elongation.

(noun) an addition that extends a main building. Synonyms: annex, annexe, wing.