Professor

Teachers at Hogwarts School of Witchcraft and Wizardry use the title Professor when being spoken to mostly by students. The term Sir or Madam is an alternative term for Professor depending on the gender as the word Professor is a little long for some. While talking to their colleagues, they usually use their first name. Professor Snape however preferred to use others' surnames, for example when he called Remus Lupin, Lupin or Gilderoy Lockhart, Professor Lockhart in the Dueling Club in HP2.

Professors have the power to award and dock points, give detention and write notes for certain restricted things. The restriction section in the Hogwarts Library is one example.