n.

1. 伯父；叔父；姑父；姨丈；舅父
   My uncle has a good sense of humor.

   我的叔叔很有幽默感。

2. （用於對年長男子的稱呼）大叔；叔叔，伯伯
   Jimmy is uncle to all the kids who like to go boating with him.

   那些喜歡和吉米一起乘船遊玩的孩子都把他當叔叔。

n.

1. the brother of one's father or mother or the husband of one's aunt.
   ▸informal an unrelated adult male friend of a child's parents.
2. archaic, informal a pawnbroker.