<p><strong>Noun:</strong></p><ul><li>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.</li><li>Any teacher who has the rank of professor, associate professor, or assistant professor.</li><li>A teacher.</li><li>An instructor in some art or skilled sport: a professor of singing; a professor of boxing.</li><li>A person who professes or declares particular sentiments, beliefs, etc.</li></ul>