an object lesson

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an object lesson

An actual, concrete example of something. Your overreaction was an object lesson in how to ensure that your kids don't tell you the truth.
See also: lesson, object

an ˈobject lesson

a practical example of what you should or should not do in a particular situation: It was an object lesson in how not to make a speech. He did absolutely everything wrong.An object lesson was a school lesson that used real objects as a way of teaching in a very direct and practical way.
See also: lesson, object
References in periodicals archive ?
On many levels, Steinberg's book is an object lesson in how to interrogate a painting, and one which opens up many new interpretative possibilities: a painting often thought of as clear and direct becomes rich and multivalent.
Johann Heinrich Pestalozzi (1746-1827) advocated the use of the object lesson. Thus, if students were to read about a "dog," a model would be shown to students.
The object lesson for the GK is: Never give up on any kind of shot.
Whatever your views, it was a masterly performance, an object lesson in how to turn a hostile audience to your way of thinking.
The Rebellion Theatre Company's off-Broadway production of Uncle Bob is an object lesson in the difference between TV acting and stage acting.
What began as small time political corruption, which is rampant, in this country, has become a national object lesson on integrity, and it's not clear to me that people much care.
How he has done that is an object lesson in strategically managing human resources.
The frantic efforts of the SS to provide itself with an avenue of escape provide an object lesson in the smaller moral bankruptcies that accompanied the more conspicuous evils of the Nazi regime, but they form an entirely different lesson from that taught by the death factories and macabre medical experiments of Nazi scientists.
For an object lesson, they might have pointed to the follies of the Holy Roman Empire--neither Roman, nor holy, nor an empire for much of its existence--and to "the medieval crisis of church and state."
All of this should be an object lesson for the rest of America.
Similarly, Argentinean author Ana Maria Shua's "A Profession Like Any Other" is an object lesson (worthy of Monty Python) in the dangers of angering one's dentist.
Withal, this careful comparative study offers an object lesson for Christian theologians, showing us how to retrieve a medieval tradition that was already interfaith, intercultural in perspective.
NEWYORK--While competitors, analysts, vendors and shareholders talk about executives whose backgrounds make them candidates to take over for Joe Antonini at Kmart, a change at the top of Sony last week offers an object lesson in surprises.
While Spotlight (see above) is an object lesson in how to tell a true story, here's the polar opposite.
Heavy conditions didn't help but there was an overload of errors by both sides in a game that never really took off but at half-time, Ponty led 19-0 and it seemed business as usual for the home side Early on they gave the massive Swansea forwards an object lesson in the dark arts of the breakdowns and were well worth their lead at the interval with the All Whites barely getting a look in.