teach a lesson


Punish in order to prevent a recurrence of bad behavior. For example, Timmy set the wastebasket on fire; that should teach him a lesson about playing with matches. This term uses lesson in the sense of “a punishment or rebuke,” a usage dating from the late 1500s. Also see learn one's lesson.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.