vt.

1. 延长，延伸；扩大，扩展
   Can't you extend your visit for a few days?

   你们访问的时间不能延长几天吗？

2. 伸，伸出
   He extended his hand in greeting.

   他伸出手来表示欢迎。

3. 致；给予，提供[（+to）]
   I would like to extend a warm welcome to our visitors.

   我想对我们的来访者表示热烈的欢迎。

4. 使竭尽全力[H]

vi.

1. 伸展；扩大；延续
   The tourist season extends from May till October.

   旅游季节从五月延续到十月。

v.

1. make larger or longer in space or time.
   ▸occupy a specified area or continue for a specified distance.
2. hold (something) out towards someone.
   ▸offer or make available.
3. (extend to) be applicable to.
4. strain or exert to the utmost.