lecturer
n. countablen. a teacher at a college or university who gives talks to large groups of students. They are usually experts in a specific subject.
n. an academic who delivers formal presentations to students at a higher education institution. Often used to describe a specific rank within the university hierarchy, typically below a professor.
The lecturer explains the history of the city.
After the talk, several students stayed behind to ask the lecturer for more details about the research.
While the professor oversees the entire department, the senior lecturer is responsible for designing the curriculum and delivering the core modules to the first-year students.
From lecture + -er.
Commonly paired with 'at' to specify the institution or 'in' to specify the subject area.