What is "extension table"

Extension \Ex*ten"sion\, n. [L. extensio: cf. F. extension. See Extend, v. t.]

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.)

   1. Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension.

   2. 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.

n. A table constructed so that it can be extended or contracted in length.