noun / verb
lecture
LEK-chur/ˈlektʃər/
An extended address intended to instruct listeners.
The professor gives a lecture using a globe before attentive students.

Etymology
From “a reading,” lecture developed the sense of reading aloud, including to students. That activity broadened into an instructional talk before an audience, whether or not the speaker reads a text.
In context
what I do in this talk or lecture as I slowly go up the number row the harmonic series and with each number I just give you time to hear it to play it
More examples
- Students take notes during the lecture and ask questions afterward.
- She lectured on American history at the public library.
- He spends the morning lecturing to first-year medical students.
Forms
lecture · lectures · lectured · lecturing
lecturer noun — A person who gives educational talks.
Similar words
- talk
- Often less formal and not necessarily intended to teach.
- presentation
- May emphasize visual material or proposals rather than extended instruction.