extension

(ĭk-stĕnˈshən)

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.

Related Forms:

• ex·tenˈsion·al adjective