Used to describe a formal and educational style, often found in universities and lectures. Her professorial tone made the complex subject easier to understand.
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Not Just Professors
While it implies a connection to professors, it's also used for people who are knowledgeable. His professorial insights on history fascinated everyone.
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Serious Undertone
Conveys a serious and possibly strict attitude, often associated with teaching. She answered with a professorial frown that demanded our attention.