n.

1. 伸展；伸長；擴大[U][（+of）]
   the extension of our foreign trade

   擴大我們的對外貿易

2. 延長；延期；緩期[U][C]
   We had hoped for the extension of the deadline to the end of the week.

   我們曾希望把最後期限延至週末。

3. 延長部分；擴大部分；增設部分[C]
   We built an extension to our house.

   我們擴建了我家的房屋。

4. 電話分機[C]

n.

1. the action or process of extending.
   ▸an additional period of time given to someone to hold office or fulfil an obligation.
   ▸Brit. permission granted to licensed premises for the sale of alcoholic drinks until later than usual.
2. a part added to something to enlarge or prolong it.
   ▸ (extensions) lengths of long artificial hair woven into a person's own hair.
3. a subsidiary telephone, especially one with its own additional number on a line leading from a main switchboard.
4. (Brit. also extension lead or cable US also extension cord) a length of electric cable which enables appliances to be used at a distance from a fixed socket.
5. [as modifier] denoting instruction by a university or college for those who are not full-time students.
6. the extending of a limb from a bent to a straight position.
   ▸Ballet  the ability of a dancer to raise one leg above the waist, especially to the side.
7. Logic  the range of a term or concept as measured by the objects which it denotes or contains. Often contrasted with intension.
8. Physics  & Philosophy  the property of occupying space.