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extension

extension


ex·ten·sion  (k-stnshn)
n.
1. The act of extending or the condition of being extended.
2. The amount, degree, or range to which something extends or can extend: The wire has an extension of 50 feet.
3.
a. The act of straightening or extending a limb.
b. The position assumed by an extended limb.
4. Medicine The application of traction to a fractured or dislocated limb to restore the normal position.
5.
a. An addition that increases the area, influence, operation, or contents of something: an extension for the vacuum cleaner; built a new extension onto the hospital wing.
b. An additional telephone connected to a main line.
6.
a. An allowance of extra time, as for the repayment of a debt.
b. The period of this extra time: three months extension on the loan.
7. The property of an object by which it occupies space.
8. A program in a university, college, or school that offers instruction, as by television or correspondence, to persons unable to attend at the usual time or in the usual place.
9. Logic The class of objects designated by a specific term or concept; denotation.
10. Mathematics A set that includes a given and similar set as a subset.
11. Computer Science A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file: In most operating systems, file names having the extension .EXE are executable files.

[Middle English extensioun, from Old French extension, from Latin extnsi, extnsin-, from extnsus, past participle of extendere, to extend; see extend.]

ex·tension·al adj.

extension [ɪkˈstɛnʃən]
n
1. the act of extending or the condition of being extended
2. something that can be extended or that extends another object
3. the length, range, etc., over which something is extended; extent
4. (Electronics & Computer Science / Telecommunications) an additional telephone set connected to the same telephone line as another set or other sets
5. (Miscellaneous Technologies / Building) a room or rooms added to an existing building
6. (Business / Commerce) a delay, esp one agreed by all parties, in the date originally set for payment of a debt or completion of a contract
7. (Physics / General Physics) the property of matter by which it occupies space; size
8. (Life Sciences & Allied Applications / Physiology)
a.  the act of straightening or extending an arm or leg
b.  its position after being straightened or extended
9. (Medicine) Med a steady pull applied to a fractured or dislocated arm or leg to restore it to its normal position See also traction [3]
10. (Social Science / Education)
a.  a service by which some of the facilities of an educational establishment, library, etc., are offered to outsiders
b.  (as modifier) a university extension course
11. (Philosophy / Logic) Logic
a.  the class of entities to which a given word correctly applies: thus, the extension of satellite of Mars is the set containing only Deimos and Phobos Compare intension [1a]
b. 
conservative extension a formal theory that includes among its theorems all the theorems of a given theory
[from Late Latin extensiō a stretching out; see extend]

extension  (k-stnshn)
1. Mathematics A set that includes a given and similar set as a subset.
2. Computer Science A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file.


extension  /kstnn/  n. 1 [C;U] more time: The businessman asked the bank for an extension on his bank loan. 2 [C] an addition to a building: We added an extension for an extra bedroom onto our house. 3 [C] any one of many connected telephone lines: Call the companys main number, 555-2000, and ask for my office extension, 245 (said extension 2-4-5). extension

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