lecture UK /ˈlɛk.t͡ʃə/US /ˈlɛk.t͡ʃɚ/noun 4verb 2forms 5 noun4 •a long speech that explains a subject to an audience in order to teach themDuring class today the professor delivered an interesting lecture. •A class that primarily consists of a (weekly or other regularly held) lecture (as in sense 1), usually at college or university.We will not have lecture tomorrow.Lecture notes are online. •A berating or scolding, especially if lengthy, formal or given in a stern or angry manner.I really don't want you to give me a lecture about my bad eating habits. •(no longer used) The act of reading. verb2 •To teach (somebody) by giving a speech on a given topic.The professor lectured to two classes this morning. •To preach, to berate, to scold.Emily's father lectured her about the importance of being home before midnight. formslectured · lecturing · lectures · lectureth · lecturest