Note: Although it refers to professors, which could include both men and women, the word itself is grammatically masculine.
Here are some examples:
* Les profs sont en grève. (The professors are on strike.)
* J'ai beaucoup aimé mes profs de lycée. (I liked my high school teachers a lot.)
If you want to specifically refer to female professors, you would use "les professeures" or "les femmes professeurs".