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.
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 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]