4 definitions
Definition.com
Learning a lesson (n.) is tuition paid entirely in embarrassment.
Definition.com
Learning a lesson (n.) is announced by parents in a voice that suggests they arranged it.
Definition.com
Learning a lesson (n.) is always described in the past tense by people who are currently doing it again.
Definition.com
Learning a lesson (n.) is what we call the damage once we have decided to keep it.