What is a lecture?

Lecturing is the second oldest form of teaching. "Lecture" comes from the Latin lecture, meaning "to read aloud". (The oldest form of teaching and persuasion was the one-to-one dialogue or conversation of the ancient Greek philosophers; this approach is still used in the modern Tutorial.)

Lecturing was an early form of educational technology and arose at a time when books were expensive and rare; reading them to others was the most efficient way to communicate or introduce new content.