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1. 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. Act of expanding in scope; making more widely available
   "extension of the program to all in need"
    
3. The spreading of something (a belief or practice) into new regions
   - propagation
    
4. An educational opportunity provided by colleges and universities to people who are not enrolled as regular students
   - extension service, university extension
    
5. Act of stretching or straightening out a flexed limb
    
6. 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";
   - filename extension, file name extension
    
7. 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";
   - reference, denotation
    
8. 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. Amount, degree or range to which something extends
   "the wire has an extension of 50 feet";
   - lengthiness, prolongation
    
10. An additional telephone set that is connected to the same telephone line
    - telephone extension, extension phone
     
11. An addition to the length of something
    - elongation
     
12. An addition that extends a main building
    - annex, annexe [Brit], wing

Derived forms: extensions

Type of: addition, add-on, airing, dance, delay, didactics, dissemination, education, educational activity, enlargement, expansion, hold, improver, instruction, longness, meaning, pedagogy, phone, postponement, property, public exposure, spreading, stretching, string, substance, teaching, telephone, telephone set, time lag, wait

Antonym: flexure

Part of: building, computer file name, computer filename, edifice, file name, filename

Encyclopedia: Extension, Louisiana