Professor

noun

1. The most senior rank for an academic at a university or similar institution, informally also known as "full professor." Abbreviated Prof.
2. A teacher or faculty member at a college or university regardless of formal rank.
3. One who professes something, such as a religious doctrine.
4. A pianist in a saloon, brothel, etc.
5. The puppeteer who performs a Punch and Judy show; a Punchman.