(~s)
Frequency: The word is one of the 1500 most common words in English.
1.
A ~ in a British university is the most senior teacher in a department.
...Professor Cameron...
In 1979, only 2% of British ~s were female.
N-TITLE; N-COUNT; N-VOC
2.
A ~ in an American or Canadian university or college is a teacher of the highest rank.
Robert Dunn is a ~ of economics at George Washington University.
N-COUNT; N-TITLE; N-VOC