Anything used as an example or lesson which serves to warn others as to the outcomes that result from a particular action or behavior, as exemplified by the fates of those who followed that course.
Let that be an object lesson to him.
Object-lesson Sentence Examples
xiv.), which point in the same direction, and indicate that the model of the liver was used as an object lesson to illustrate the method of divination through the liver.
3 "A careful comparison of Chronicles with Samuel and Kings is a striking object lesson in ancient historical composition.
in 1773 was an object-lesson in the supremacy of the pope.
In England the political schemings of Parsons were no small factors in the odium which fell on the Society at large; and his determination to capture the English Catholics as an apanage of the Society, to the exclusion of all else, was an object lesson to the rest of Europe of a restless ambition and lust of domination which were to find many imitators.
So striking an object lesson was not lost on the Prussian regent, and he entered on a vigorous policy of reforming and strengthen ing the army, General von Roon being appointed minister of war for this purpose.