- a teacher of the highest academic rank in a college or university, who has been awarded the title Professor in a particular branch of learning; a full professor: a professor of Spanish literature.
- any teacher who has the rank of professor, associate professor, or assistant professor.
- a teacher.
- an instructor in some art or skilled sport: a professor of singing; a professor of boxing.
- a person who professes or declares particular sentiments, beliefs, etc.
- the principal lecturer or teacher in a field of learning at a university or college; a holder of a university chair
- any teacher in a university or college
- a person who claims skill and instructs others in some sport, occupation, etc
- a person who professes his opinions, beliefs, etc
