someone who lectures professionally
"The university hired her as a lecturer to teach advanced physics courses every semester."
A person who gives lectures, especially as a profession.
"After graduating from university, she became a lecturer at the local college where she teaches history every semester."
In plain English: A lecturer is someone who teaches classes at a college or university and shares their knowledge with students.
"The university lecturer gave an engaging talk on modern history to hundreds of students."
Usage: A lecturer is typically an academic professional whose primary role involves delivering formal talks or courses at a university or college. While the term can apply to anyone giving speeches, it most commonly refers to this specific educational occupation rather than general public speakers.
The word lecturer comes from combining the noun lecture with the agent suffix -er to describe someone who delivers a lecture. It entered English as a straightforward formation based on the act of lecturing rather than through borrowing or shifting meanings.