1.
an educational talk to an audience, especially to students in a university or college.
synonyms: speech, talk, address, discourse, disquisition, presentation, oration, lesson
"a lecture on children's literature"
a long, serious speech, especially one given as a scolding or reprimand.
"the usual lecture on table manners"
synonyms: scolding, chiding, reprimand, rebuke, reproof, reproach, upbraiding, berating, admonishment, sermon; More