n. The act of reading; reading.n. A discourse, especially a written discourse, of suitable length for a single reading; a disquisition pronounced or read, or written as if to be read, before an audience; especially, a formal or methodical discourse intended for instruction: as, a lecture on morals; the Bampton lectures.n. A religious discourse of an expository nature, usually based on an extended passage of Scripture; a discourse less methodical and more discursive than a sermon.n. A reprimand, as from a superior; a formal reproof.n. A professorial or tutorial disquisition.n. A lectureship.To instruct by oral discourse.To speak to or address dogmatically or authoritatively; reprimand; reprove: as, to lecture one for his faults.To influence by means of a lecture or formal reprimand: as, he was lectured into doing his duty.To read or deliver a formal discourse; give instruction by oral discourse: as, to lecture on geometry or on chemistry.