ex·ten·sion /ɪkˈstɛn(t)ʃən/
  U伸長,擴大,伸展;延長,延期;C延長部分,擴大部分;C電話分機
  ex·ten·sion /ɪkˈstɛnʧən/ 名詞
  (拉extensio)伸展,延長,擴散,蔓延,伸展
  extension
  延伸; 分機
  extension
  延伸 擴充
  Ex·ten·sion n.
  1. The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.
  2. Physics That property of a body by which it occupies a portion of space.
  3. Logic & Metaph. (a) Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension.  (b) the class or set of objects to which a term refers; -- contrasted with intension, the logical specification which defines members of a class, being the set of attributes which are necessary and sufficient to recognize an object as a member of the class.
     The law is that the intension of our knowledge is in the inverse ratio of its extension.   --Sir W. Hamilton.
     The extension of [the term] plant is greater than that of geranium, because it includes more objects.   --Abp. Thomson.
  4. Surg. The operation of stretching a broken bone so as to bring the fragments into the same straight line.
  5. Physiol. The straightening of a limb, in distinction from flexion.
  6. Com. A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
  Counter extension. Surg. See under Counter.
  Extension table, a table so constructed as to be readily extended or contracted in length.
  ◄ ►
  extension
       n 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 [syn: propagation]
       4: an educational opportunity provided by colleges and
          universities to people who not enrolled as regular
          students [syn: extension service, university extension]
       5: act of stretching or straightening out a flexed limb [ant: flexion]
       6: 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" [syn: 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" [syn: 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 or degree or range to which something extends; "the
          wire has an extension of 50 feet" [syn: lengthiness, prolongation]
       10: an additional telephone set that is connected to the same
           telephone line [syn: telephone extension, extension
           phone]
       11: an addition to the length of something [syn: elongation]
       12: an addition that extends a main building [syn: annex, annexe,
            wing]