A "stern lecture" is a serious and strict talk given by someone to another person, usually to express disapproval or to provide strong guidance. Full definition
It's heating up leftovers at 5:37 p.m. on Thursdays, it's organizing closets on Saturday afternoons at 1:28 p.m. after the morning's dentist appointments followed by stern lectures about flossing, too. (sarahbessey.com)
Especially among 18 - to - 29 year olds, Bible reading has come to feel like homework, associated with «right» interpretations and «wrong ones,» and accompanied by stern lectures from the pulpit. (religion.blogs.cnn.com)
However, it's known that Daly had received stern lectures and written reprimands from Beman, who, like others in the sport, had become increasingly concerned about Daly's conduct. (si.com)