extension

Noun

• an addition that extends a main building

• an addition to the length of something

• an additional telephone set that is connected to the same telephone line

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

• 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
    

• 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
    

• 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
    

• act of stretching or straightening out a flexed limb

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

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

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

• 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
    

Related words

• Synonyms: 
  annex , annexe , wing , elongation , telephone extension , extension phone , lengthiness , prolongation , reference , denotation , filename extension , file name extension , extension service , university extension , propagation
• Antonyms: 
  flexion , flexure