—n. 1. a speech read or delivered before an audience or class, esp. for instruction or to set forth some subject: a lecture on Picasso's paintings. 2. a speech of warning or reproof as to conduct; a long, tedious reprimand.
—v.i. to give a lecture or series of lectures: He spent the year lecturing to various student groups.
—v.t. 1. to deliver a lecture to or before; instruct by lectures.
2. to rebuke or reprimand at some length: He lectured the child regularly but with little effect.