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Noun extension has 12 senses
  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"
    --1 is a kind of     delay, hold, time lag, postponement, wait
  2. extension - act of expanding in scope; making more widely available; "extension of the program to all in need"
    --2 is a kind of     expansion, enlargement
    --2 has particulars: spread, spreading; stretch
    Derived form: verb extend1
  3. propagation, extension - the spreading of something (a belief or practice) into new regions
    --3 is a kind of dissemination, airing, public exposure, spreading
  4. extension, extension service, university extension - an educational opportunity provided by colleges and universities to people who not enrolled as regular students
    --4 is a kind of education, instruction, teaching, pedagogy, educational activity
    --4 has parts: extension course
  5. extension - act of stretching or straightening out a flexed limb
    --5 is a kind of     stretching
    Antonyms: flexion, flexure
    --5 has particulars: hyperextension
    Derived form: verb extend8
  6. extension, filename extension, file name extension - a string of characters beginning with a period and followed by one to three 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"
    --6 is a kind of string
    --6 is a part of filename, file name, computer filename, computer file name
  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"
    --7 is a kind of meaning, substance
  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"
    --8 is a kind of     property; dance
  9. extension, lengthiness, prolongation - amount or degree or range to which something extends; "the wire has an extension of 50 feet"
    --9 is a kind of longness
  10. extension, telephone extension, extension phone - an additional telephone set that is connected to the same telephone line
    --10 is a kind of telephone, phone, telephone set
  11. elongation, extension - an addition to the length of something
    --11 is a kind of addition, add-on, improver
  12. annex, annexe, extension, wing - an addition that extends a main building
    --12 is a kind of addition, add-on, improver
    --12 is a part of building, edifice
    --12 has particulars: ell
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