Extension, n.
Etymology: [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.)
7 more senses
Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension. 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.