D defs.my
Entry 6 senses Webster, 1913

Extension

/ĭk-stĕn'-shən/ · Ex·ten·sion · IPA /ɪkˈstɛnʃən/
01 n. The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmenta…
  1. 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. 2.
    That property of a body by which it occupies a portion of space.(Physics)
  3. 3.
    Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension.(Logic & Metaph.)
    “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. 4.
    The operation of stretching a broken bone so as to bring the fragments into the same straight line.(Surg.)
  5. 5.
    The straightening of a limb, in distinction from flexion.(Physiol.)
  6. 6.
    A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.(Com.)
Phrases & compounds
Counter extension — See under Counter.
Extension table — a table so constructed as to be readily extended or contracted in length.