Meaning of EXTENSION in English

vt the straightening of a limb, in distinction from flexion.

2. extension ·vt that property of a body by which it occupies a portion of space.

3. extension ·vt a written engagement on the part of a creditor, allowing a debtor further time to pay a debt.

4. extension ·vt the operation of stretching a broken bone so as to bring the fragments into the same straight line.

5. extension ·vt capacity of a concept or general term to include a greater or smaller number of objects;

— correlative of intension.

6. extension ·vt the act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.

Webster English vocab.      Английский словарь Webster.