1A person who speaks at a lecture, seminar, or training session, sharing expertise with an audience.
今日の講演会の講師はIT業界で有名な人だ。
Today's lecture speaker is a well-known figure in the IT industry.
講師の話がわかりやすく、時間があっという間に過ぎた。
The speaker's talk was easy to follow, and the time flew by.
研修の講師に質問するコーナーが設けられた。
A Q&A session was set up for asking the training's instructor questions.
2A teaching staff member at a university or college who gives lectures or supervises research, whether full-time or part-time.
彼女は来年から大学の講師になる予定だ。
She is scheduled to become a university lecturer starting next year.
講師から准教授に昇進した。
He was promoted from lecturer to associate professor.
その講師のゼミは学生に人気がある。
That lecturer's seminar is popular among students.
3A person who teaches classes at a school on a part-time or hourly basis, rather than as a full-time employee.
彼は大学院生をしながら塾の講師も務めている。
He works as a part-time cram-school teacher while also being a graduate student.
非常勤講師の待遇改善が議論されている。
Improving the working conditions of part-time teachers is being discussed.
4An instructor at a cram school or prep school who teaches exam-prep classes to help improve students' grades.
有名予備校の講師の授業をオンラインで受けられる。
You can take classes online taught by tutors from famous cram schools.
あの講師の解説はわかりやすいと評判だ。
That tutor's explanations are reputed to be easy to understand.