1. (

• extension

) 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" ;

2. (

• extension ,

) act of expanding in scope; making more widely available; "extension of the program to all in need" ;

3. (

• propagation ,
• extension ,

) the spreading of something (a belief or practice) into new regions ;

4. (

• extension ,
• extension_service ,
• university_extension

) an educational opportunity provided by colleges and universities to people who are not enrolled as regular students ;

5. (

• extension ,

) act of stretching or straightening out a flexed limb ;

6. (

• extension ,
• filename_extension ,
• file_name_extension

) a string of characters beginning with a period and followed by one or more 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" ;

7. (

• reference ,
• denotation ,
• extension

) 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" ;

8. (

• extension ,

) 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" ;

9. (

• extension ,
• lengthiness ,
• prolongation

) amount or degree or range to which something extends; "the wire has an extension of 50 feet" ;

10. (

• extension ,
• telephone_extension ,
• extension_phone

) an additional telephone set that is connected to the same telephone line ;

11. (

• elongation ,
• extension ,

) an addition to the length of something ;

12. (

• annex ,
• annexe ,
• extension ,
• wing ,

) an addition that extends a main building ;