noun
General term for someone who gives a lecture, talk, or presentation at an event, seminar, or conference.
今日の講演会の講師は有名な作家です。
The speaker at today's lecture is a famous author.
noun
Specifically a teaching position at a university or college, often below professor rank.
彼女は大学で英語の講師をしている。
She works as an English lecturer at a university.
noun
part-time teacher
Refers to a part-time or adjunct teaching role, often in schools or language institutes.
日本語学校で非常勤講師として働いています。
I work as a part-time teacher at a Japanese language school.
noun
tutor; cram school teacher
Typically used for instructors at private cram schools (juku) or tutoring centers.
塾の講師は生徒一人ひとりに合わせた指導をする。
Cram school tutors provide instruction tailored to each student.