n.[C]

1. 訪問者；留住客；探病者
   Marty was a frequent visitor to our house.

   馬蒂過去是我們家的常客。

2. 觀光者；參觀者
   There are many visitors to the White House every year.

   每年參觀白宮的遊客很多。

3. 視察者，檢查者
4. 候鳥

n.

1. a person visiting a person or place.
2. Ornithology  a migratory bird present in a locality for only part of the year.