A section of learning or teaching into which a wider learning content is divided.
In our school a typical working week consists of around twenty lessons and ten hours of related laboratory work.
A learning task assigned to a student; homework.
Something learned or to be learned.
Nature has many lessons to teach to us.
Something that serves as a warning or encouragement.
I hope this accident taught you a lesson!
A section of the Bible or other religious text read as part of a divine service.
Here endeth the first lesson.
A severe lecture; reproof; rebuke; warning.
An exercise; a composition serving an educational purpose; a study.
To give a lesson to; to teach.