teacher是老师的意思，而faculty则是教职工的意思，区别可以从以下例子看出：

There are many faculty in our university, and also there are few teachers, who teach various subjects. 我们大学有很多教职员工，也有少量教师可以教授各种学科。

teacher释义：

n. 教师；导师

n. (Teacher)人名；(英)蒂彻

faculty释义：

n. 科，系；能力，官能；全体教员