definition of
lesson

[1] #1 lesson n. a unit of instruction; "he took driving lessons". wn

[2] #2 lesson n. [example, deterrent example, object lesson] punishment intended as a warning to others; "they decided to make an example of him". wn

[3] #3 lesson n. [moral] the significance of a story or event; "the moral of the story is to love thy neighbor". wn

[4] #4 lesson n. a task assigned for individual study; "he did the lesson for today". wn